ECS K7S5A socket A motherboard: $15
Solid board. I've been using it in a spare machine for years. Being ~6 years old, the CMOS battery is starting to run low. So far it's just given me "low battery" warnings after power outages, hence I've not replaced it.

Airnet Gigabit PCI NIC: $9
This model. Used for a year, works great. Still have the original box and driver CD.

a friend of mine is having network card issues, i havent had the chance to test it out for sure or not, but i may be interested in the nic

I'll offer $8 for the motherboard. I used to have the same MB a looong time ago.

How much do replacement batteries cost?

Hmm. First result on eBay is going for $25 after shipping, with over a day left. Wal-Mart carries batteries for around $5, maybe less, I'm not sure. Anyway, I'll keep the board if I can't get at least $15 out of it.

If anyone is interested, the ECS K7S5A is a very solid board. Entry level, but very reliable. I ran one for about 4 years non-stop except for mandatory power downs and moving the computer. Not a single problem except for some overheating issues on my part.