Hey, Debra,
I once did the Saba, St. Kitts, St. Eustatius "loop" and enjoyed all three. The premier dives were on Saba, but Statia was good diving; it was just not in the same league as Saba. St. Kitts was nice, too, but with somewhat more limited dive sites than the former. I, however, really liked the relaxed atmosphere on St. Kitts.
Back to Statia: Dive Statia, owned by Judy and Mike Brown, did a nice job for me. The Old Gin House provided good, clean, if somewhat spartan accommodations.
Supposedly, there are lots of 19th Century wrecks to see around Statia, but most are shadows in the sand/coral, having been whipped around by hurricanes and plundered by divers. However, every once and while current or storms turn up something new. Do not expect an Atocha, though! The reefs are in great shape and the sea life is abundant. I do not think the diving will disappoint you at all!
Sounds like the price is right, but if that is the price for the months of July-October, you are flirting with hurricane season!
Hope this helps,
Scorpionfish