Not a PvPer, but perhaps this can help with the price question.
If you do not have any of the campaigns and would just like access to only the PvP area, buy online at
www.plaync.com.
*PVP Access Kit - USD19.95
Description:
Gain instant access to the Player versus Player portion of Guild Wars with the new PvP Access Kit. This package contains everything you need to jump right into the competitive world of Guild Wars PvP! No other Guild Wars purchase necessary.
Create and play PvP-Only characters from any of ten Guild Wars professions across all three campaigns (Warning: Access to Rolepalying characters requires purchase of a Guild Wars campaign.)
The PvP Access Kit also includes 60 free unlocks (20 elite skills, 20 normal skills and 20 items) to help you power up your game instantly. Mix and match with Skill and Item Unlock Packs to further enhance your PvP characters.
After getting this, you should hopefully have access to the in-game store. Products include:
*PvP Item Unlock Pack - USD9.95 (Sale:USD4.95 til Dec31)
Description:
Unleash the full power of 319 item upgrades components (Runes, Insignias, Inscriptions, and more) for use in PvP. Always go to combat with the exact gear you want. [This will probably NOT include any special PvE specific armors.]
*Core Skill Unlock Pack - USD9.95 (Sale:USD4.95 til Dec31)
Description:
Take your game to the next level by unlocking 241 core skills spanning all Guild Wars games. You MUST own EITHER a full campaign (the original Guild Wars, Factions, or Nightfall) OR the PvP Access Kit before you can purchase this kit.
Details:
If you own any full Guild Wars campaign (the original Guild Wars, Factions, or Nightfall), you will receive:
-Immediate access to these unlocked skills for your Heroes and PvP characters.
-Ability to acquire these skills (except elite skills) for your Heroes and PvP characters through a Skill Trainer.
If you own only the Guild Wars PvP Access Kit, you will receive:
-Access to these unlocked skills for your PvP characters.
*Prophesies Skill Unlock Pack - USD9.95 (Sale:USD4.95 til Dec31)
Description:
Take your game to the next level by unlocking 214 skills introduced in the original Guild Wars campaign. You MUST own EITHER the original Guild Wars OR the PvP Access Kit before you can purchase this kit.
Details:
If you own the original Guild Wars, you will receive:
-Immediate access to these unlocked skills for your Heroes and PvP characters.
-Ability to acquire these skills (except elite skills) for your Heroes and PvP characters through a Skill Trainer.
If you own only the Guild Wars PvP Access Kit, you will receive:
-Access to these unlocked skills for your PvP characters.
*Factions Skill Unlock Pack - USD9.95 (Sale:USD4.95 til Dec31)
Description:
Take your game to the next level by unlocking 330 skills introduced in Guild Wars Factions. You MUST own EITHER Factions OR the PvP Access Kit before you can purchase this kit.
Details:
If you own Factions, you will receive:
-Immediate access to these unlocked skills for your Heroes and PvP characters.
-Ability to acquire these skills (except elite skills) for your Heroes and PvP characters through a Skill Trainer.
If you own only the Guild Wars PvP Access Kit, you will receive:
-Access to these unlocked skills for your PvP characters.
*Nightfall Skill Unlock Pack - USD9.95 (Sale:USD4.95 til Dec31)
Description:
Take your game to the next level by unlocking 350 skills introduced in Guild Wars Nightfall. You MUST own EITHER Nightfall OR the PvP Access Kit before you can purchase this kit.
Details:
If you own Nightfall, you will receive:
-Immediate access to these unlocked skills for your Heroes and PvP characters.
-Ability to acquire these skills (except elite skills) for your Heroes and PvP characters through a Skill Trainer.
If you own only the Guild Wars PvP Access Kit, you will receive:
-Access to these unlocked skills for your PvP characters.
*Eye of the North Skill Unlock Pack - USD9.95 (Sale:USD4.95 til Dec31)
Description:
Take your game to the next level by unlocking 100 skills introduced in Guild Wars: Eye of the North expansion. You MUST own EITHER Eye of the North OR the PvP Access Kit before you can purchase this kit.
Details:
If you own Eye of the North, you will receive:
-Immediate access to these unlocked skills for your Heroes and PvP characters.
-Ability to acquire these skills (except elite skills) for your Heroes and PvP characters through a Skill Trainer.
If you own only the Guild Wars PvP Access Kit, you will receive:
-Access to these unlocked skills for your PvP characters.
If you are wondering what is the difference between core and all the other skills, some skills are available throughtout all campaigns (core), while some skills are campaign specific.
It's long, perhaps irrelevant, but hope this answers some questions. The descriptions are copied verbatim from the descriptions provided by GW in-game store. As I mentioned, not a PvPer, so hopefully someone else can help you if you have any further questions.