How much is this item worth at this time? I have all ten and am debating if I should sell them to someone or use them for the achievement. Please let me know what you guys think :)

It's 25 for the achievement and they're usually around 10-20k.

Well I'm not too excited to particularly get this achievement so I'm selling off the 10 that I have. I heard there was a glitch and that's why they aren't showing up in shops. I've also heard people sell them from 25k-1mil (haven't heard anyone who was lucky enough to find one for 10k) but either way I'm not going to take advantage of the glitch. They are currently in my trades and am looking for mostly pure for them. So post on here or comment/message me if you are interested in buying. thanks :D