You could get a mourning gecko, they are awesome. They are all female and lay fertile eggs without needing a male. Plus the eggs incubate at room temp. (mid 70s) and the gecks themselves do well at that temp.
They are small, around 3 inches max including the tail, and you can usually get them for about 10 bucks each at a herp show. You can also comfortably house several in a ten gallon tank. One lady I know bought one, several years later she has 56! All from the original female. Here is a good caresheet.
http://www.gekkota.com/html/lepidodactylus_lugubris.html
Honestly I'm not sure why they aren't more popular.