Well, actually if you buy purple stones and try to get +10 you probably would spend much more than 1kkk, unless you have luck.
In my case i spended 50kk in +0 claws, 2 purples 700kk+ 5 reds 200kk, those are 950kk, and just got +7,
So the price is really good for the actual situation,
Lel thats not how pricing works but okay. You sold it. Im fine with it. I've sold my lvl 70 +5 heli wand for 250kk but according to this I could've spent 5 purple stones and then priced it for over 1kkk lel hahaha but what I did is 5 pink one which is like 200kk and 50kk profit I guess. Dunno. Im not really into economy in this game. Cuz it sucks alot.