I'd like to have an accelerator for my Apple //c, and the Zip Chip is the obvious choice. No preference between the 4 and 8 Mhz versions, as long as it's in good working order. I'd also be okay with a Rocket Chip or some other slotless accelerator of which I am unaware, but I'd prefer a Zip.
The most I'd be willing to pay for one is about 100 USD. If you're willing to sell, give me a shout!
Thanks for reading.