Never used Google Checkout, but use Pay Pal or my credit card a lot. Pay Pal does charge a certain amount when you receive money from a buyer (or from a donation) but not if you are buying something. Easy to set up and easy to use.
1) Gigabyte GA-990XA-UD3, Phenom II 970, 8Gb G Skill Sniper 1866, EVGA GTX670 2Gb, GTX9800+ Physix, 2x 500Gb SATA II, DVDRW, Win 7 Ultimate 64 bit RTM
2) 970DE3/U3S3, Phenom II 955, 4Gb G Skill 1600, EVGA GTX 560Ti, 280Gb Seagate SATA II, crappy DVD drive (but it works, LOL) Win 7 Ult. 64 bit
3) AX78, Phenom 9600, 2Gb OZC PC6400, EVGA GTX 560Ti, CDRW/DVD, CM CP600PCAR 600W, Win 7 Ult. 64 bit
Proud volunteer on the USS Iowa