iMac (late 2006 - ver. 6.1) 24" All-in-one

Not a bad computer if...

The video card is good..but many maybe even most fail. I have 3 of these in various stages of disarray mostly due to that....actually one got peed on by a customers dog...but thats a different story.

The bad:

Video card is replaceable but expensive, hard to find, and un-reliable. Video ram 128k is tiny but I think the only other they made for this model is 256k.
Terribly heat handling, gets hot quick and the venting is poor. Probably why the video cards fail.

The good:

Large matte finish lcd, fairly high res.
Intel processor. Fine for web surfing, photo editing, etc. Poor for video, games. I use one for Garageband/Logic and it works fine with fans turned up.

If you buy:

Install SMC fan control and spin the fans up (you'll have to deal with some fan noise) and/or, cut some extra holes in the back to move more air out of the enclosure.

Price:

I usually buy them for $100--250 depending on video card functionality.
In theory you can reflow the video cards on these using an oven but the 2-3 I've tried failed.

Good luck.