Buyback? How can you buy something you never owned 'back', using other people's money?
Aside from the obvious fact that it's just another bastardization of the language (like 'assault weapon' - more on that later - or 'n*gg*rtown Saturday night special - yeah, that's the original terminology), it's nothing more than a 'feel-good' dog and pony show hatched by politicians who want to show the feebs they misrepresent that they're 'doing something'. If they wanted to 'do' something constructive, they'd find a way to segregate violent criminals from the rest of society - oh, wait...aren't those things called 'prisons' supposed to be used for that? - and have them joined by judges and parole boards who toss them back among us with little or no time in 'country clubs', where they learn to be better criminals. Of course, that might also mean more cops have to do real police work, rather than sitting by the roadside with radar guns, harassing people for littering (that should be up to us) or jaywalking, or doing union organizing on our dime.
That said, back to the topic at hand: Part of the 'deal' in a so-called 'buyback' is 'no questions asked' - as mentioned, you have a 'hot piece', what better way to dispose of it? You have a rusted-out frame you found the last time there was actually water in the San Pedro? Not worth $5 as scrap, but they'll buy it 'back' for a healthy multiple of that. The next time one is announced, denounce it for the sham it is.