I am looking at picking up a Craigslist group of females and their setup. Currently they are in a 18x18x24 exo terra. Is this acceptable to start? There are 3 females that are 1.5 years old. The person wants $150 for the whole setup (magnetic shelf, water bowl, hides, plants, vines, background) and all 3 geckos, which are apparently chocolate harlequins.

Any thoughts/tips would be much appreciated.

Thanks!
Andrew