feedback extortion

[compositelab]

I sold a set of Used wheels. I took multiple,  large,clear images of each wheel and grouped together. The description says to powdercoat them. They are vintage, used, rare and in demand, but the price reflected in suggesting they should be refinished. 

The buyer sent me this message because a shop (He says) is giving him an outrageous price to paint them: 

If you work with me about this deal, then I will not put negative feedback if you’re not respond and not work with me I will put a negative feedback because if I have to spend close to $2000 to complete the whole thing

That's more than the wheels sold for and absolutely no place would charge that amount. He's trying to rip me off 😞 

I just got the message today, so he hasnt left feedback YET... what do i do? 

thank you for your help

[compositelab]

He's unhappy with the quote he got from another dealer to paint them.  I dont see how thats my fault??

Shipping wheels is expensive.  If he covers the return shipping, i would be more than happy to take them back, but for me to spend $200 so someone could get them and take them in for a refinishing quotes...and then change their mind when they dont like the quotes isnt fair to me.  i dont think i should have to pay for that. ..or maybe im wrong? 

He just emailed again Today saying i had 24hrs to come up with a resolution.