How about finding this pair at a local garage sale..
"Prophet T8 and 600, need to sell, $500 for both or make me an offer! They are taking up space, and they are like really old.. The T stands for totally ancient, from some long dead company called Sequential Something or other. The company was started way back in the 70s by a guy named Smith, I think.. They were considered cool in their time, so s**t, $500 is a good deal. Come on man, help me out here! For only $500 bucks your musical work will be all play! I mean, I think they still mostly work anyway.."
"Oh and, if your still not convinced this is a good deal, there are these guys at a place called, Wino Country, that could probably fix anything that might be wrong with 'em.. Look, you get vintage, old but cool stuff, I reclaim some space, and for only a few hundred, and maybe a little help from the Winos, you'll be knocking out some analog goodness in no time! It's a win-win baby!"