A truly stock SE/30 with bad capacitors is overpriced if the seller is asking more than $100 for it (not including shipping, of course). Seriously. I say this as someone who watches the EBAY Vintage Mac section daily, and knows the hardware and features quite well. The only reason to pay more than $100 is if the SE/30 comes with some extras (i.e., those things that are not stock). But if you were able to find a tricked out SE/30 on EBAY, a reasonable price could be $400, $600 or even more, depending on the condition of the machine and what is offered. I personally consider my SE/30 to be valued at about $1,000. But I love the thing to much to sell it. If you ever do see it on EBAY, it probably means my fingers are cold (and buried 6 feet under).