The deal is cool unless you have some use for a 700 MHz rig. Your $35 could go toward a more capable board.
I'm running 5 of these boards, with overclocked Athlon XP Palomino's at 1700 MHz and Thoroughbred "A"'s at 1800 MHz. They have been very solid and reliable for me. Paid $10 per board about 18 months ago from Andaratech.com (now defunct). It sometimes shows up as the cheapest socket "A" mobo on pricewatch.
This is a very early socket A Athlon/Duron board. It has a jumper to select the 133 MHz front side bus, but don't bother, the KT133 chipset is only good to about 110 MHz. XP chips can be used with the 100 MHz bus, but need the multiplier changed on the chip to get full performance from them.
The onboard voltage regulators have heatsinks and seem able power any athlon chip.
The HALT instruction operates when the board is idle to save power.
There are bioses and bios tools which unlock more features than the vanilla bios. The original bios had problems with PCI bus conflicts.
The suspend-to-ram feature works.
Sdram can operate at 133 MHz (asynch).
Two USB ports and a header for two more, but no game port.