http://FamilyTreeDNA.com has test kits on sale for 20% off this month. If you have been waiting to get in the game, now is the time. Our preferred test is the Y-DNA tests, which are on-sale starting at $139 (37 markers is generally sufficient for a quality match).
If you are a Babb in England, the Babb Family Association will likely pay for your test. Please contact me directly for more information, by responding to this post.
If you have already tested on another site, we are particularly interested in Males who still bear the surname Babb. There is a process involved in getting those into our database. Contact me for that scenario as well.