Hard Mode Chest Question

Does hardmode increase the chance of a lockpick breaking?

In Hard Mode, if I remember correctly, you have a base 10% chance of retaining a lockpick. That chance increases based on your rank in the Treasure hunter and Lucky titles.

In normal mode the percentage is increased based on the cost of the key for that chest. I'll edit this post later with exact percentages.

thnx, couldnt find where i read that.
Also, Im still confused to weather its better to use full price or Discounted lockpicks.

They're the same lockpicks. A discount lockpick is available to those who belong to a guild that owns a town on the Kurzick or Luxon side. They have access to merchants that give a 15% discount.

If you purchase your lockpicks from a Discount Merchant, the base price of lockpicks goes down to 1200g per key, resulting in a substantial lowering of survival chance needed to break even. Discounted lockpicks will have a better value than discounted keys only if the regular priced lockpick had a better value than the regular priced key

Stop quoting that. You obviously don't even understand what your own post means if you keep asking "which is better?"

Reading comprehension ftw!
try reading it like this:

resulting in a substantial lowering of [the] survival chance [that you] need(ed) [in order] to break even(<- expression that means getting the money back you spend, so there's no loss.)

Even though they cost less, they are still considered 1500g picks for the purpose of determining breakage.