I'll be contrarian and say you folks are all living in la-la land. $225 is a little bit on the high side, but not totally unreasonable given that it also includes a keyboard and mouse, and the CRT, HD, and floppy have all been serviced/replaced.
I'm afraid I have to disagree. We're talking SE. While there are pricy units out there, you could buy a working full SE system for about half that price. I've verified from completed listings.
The current market is very variable - prices are slightly arbitary because sellers and buyers often don't know the difference between one model and another, but there is no need to pay over $200 for an SE. Given they don't require preventative recapping, all you need to find is a tidy one that works (so hasn't been battery bombed). Watching for a little while will find one. As I said before, prices vary depending on how much you want something, how much work you're planning to put in and how long you're willing to wait.
Keyboard and mouse are worth more on their own than with a machine so you don't see a machine with them selling for that much more than without.
The servicing doesn't have much value because it effectively wasn't needed, or it was repairs that another machine might not need. There isn't usually much to do with an SE. They're rugged old beasts. Buying an unserviced machine doesn't present much disadvantage.
This is a good example sold listing :
Vintage Mac SE Model 5010. Includes keyboard, mouse (missing the ball), power cable, and carrying case. The carrying case is clean and in excellent condition. The computer turns on and shows a disk icon with a question mark.
www.ebay.com
That was an absolute steal. Someone did well there.
Or this :
Two 800K Floppy Drives. The Mac seems to be working but we do not have a boot disk to fully test it. What you will see is the usual, flashing, floppy disk icon with a ‘?’. The floppy drives were partially tested with a non bootable disk.
www.ebay.com
