we have a 2010 Bob Revolution. With #2 coming shortly, I'd like to get a double, but we're on a budget and I'm trying to find one used. I found someone willing to trade their 2007 duallie. Does this sound like a good deal or you think a 2007 will be too old? She sent pictures and it looks likes it's in good condition. Do you think I'll have a problem finding a car seat adapter for it? Also, is it awkward to use a double w/ just 1? DS won't be here for another 3 months

Teterboro 5K 7/16/11 23:22
Tenafly 5K 6/5/11 26:48 1st in age group and stroller division
Teterboro 5K 7/17/10 24:42
Lincoln Tunnel 5K 4/25/10 28:18 4 1/2 weeks pp
Teterboro Airport 5K 7/18/09 22:35 3rd place age group 4 1/2 weeks pregnant
Long Branch 1/2 5/3/09 1:51:07
Lincoln Tunnel 5K 4/26/09 22:22
NJEA 5K 11/7/08 22:30 2nd place age group
Westchester 1/2 10/12/08 1:50:16
Teterboro Airport 5K 7/19/08 23:43
Long Branch 1/2 5/4/08 1:54:18
Giant Stadium 5K 4/26/08 error in timing
Hackensack 5K 10/14/07 23:55 1st place in age group
Re: Bob owners
If it's in good condition, I think 2007 is fine. There are have been a few BOB recalls (removing a cord, removing backing off some embroidery), so I'd just make sure it's up to date before using with your kids.
Here's a car seat adapter on eBay: https://www.ebay.com/itm/BOB-Infant-Car-Seat-Adapter-Duallie-Stroller-CS0702-/160739085976?pt=LH_DefaultDomain_0&hash=item256ccbce98 (there might be cheaper ones, but this is just to let you know that they are out there).
The recalls are not a big deal to fix at all so I'm sure the 2007 would be fine. I'd go for the trade if you think you'll use a double exclusively.
Personally I wanted to keep my BOB because my older child will eventually outgrow the stroller and then I'll be right back to needing a single and I LOVE my BOB and don't want to have to buy another one someday. I searched for about 3-4 months on craigslist and eventually ended up purchasing a Baby Jogger City Classic double in perfect condition with accessories. It's bob-like, but a tad smaller wheels and is normally a $650 stroller, I bought it for $200. I'd say keep your Bob and keep searching for something used. You have a few months until you'll need it and you might be able to score a great deal on a really nice double and keep your Bob too! If you want something bob-esque you should search for Baby Jogger, Dreamer Designs and Phil and Teds doubles.
Also, if you find after awhile that you are only using the double, then you can easily sell your BOB to cover the cost of a used double. Or if you don't use the double, just resell it on craigslist for what you bought it for.