i only have 1G memory on 10.6.8 wanting to upgade to mavericks. what are my options?

Absolute minimum of 2GB RAM is required to install Mavericks. I'd recommend at least 4, if your Mac can use that much.

Crucial and Other World Computing are very reliable sites for purchasing RAM.

I have purchased RAM several times from Other World Computing and have always been very satisfied with the product and service. They also have on-line instructions on how to replace the RAM.

Crucial

Other World Computing