Would you buy a "used" pair of SUPRA TK SOCIETY sneakers from your friend?

Ok so me and my friends are all skateboarding today and me and my friend swap sneaks. I wore his SUPRA TK SOCIETY high tops in purple suede. My girlfriend came by and commented how hot she thought they looked on me. You cant buy the purple suede ones anymore. My friend said he'd sell em to me. They normally cost arround $120 to $140 i think. Theyve been skated in and are broken in perfectly. He wants $100 and I think its too much so what should i pay for them? I need fast answers cuz were hanging out after 6 and if Im buying em he wants the $$$.