Signet of Capture - infinite times to purchase ?

After finishing Malaquire 's Quest, you can buy Capture of Signet.

Just wondering , can you purchase it more than 1 time ? That means, learn the signet, then capture a skill from mob, and go back to the same skill trainer and learn Capture of Signet again ?

Thanks in advance

well it costs one skill point and some gold at the only place i have seen it for sale, so i guess if you had infinite skill points somehow then you could do that...

I picked up about 10 Signets of Capture, and have been restocking regularly as I use them up- several of the skill trainers will sell them to you, and currently Signets of Capture are the only way to acquire elite skills. They do cost a skill point, and some gold, though the gold expenditure is half of what it costs to buy a skill from a vendor.

Yay, i have them more than 5, just in case a Necro boss will show up. Yesterday finished the game and saw one of them casting lifetransfer on that fire island...