If you sold, would your "small profit" get you to the next level? If not, then do not sell it. On the other hand, I am not sure why you believe the value of the domain is $30k. Smackdab is an interesting brand, but not something that would generate traffic just because of the name - a quick search showed up nothing interesting.

Which was my point of squareup or square neither probably got much search results, but now they have a killer domain with square. Instead of squa.re or something similar.

Twitter and Pownce both launched about the same time, Pownce is dead (sure it could have been founder execution issues).

Also, I am sure bigsaving.com gets a lot more traffic, but nobody to startup that ever hopes to get brand recognition would ever buy that. Its why fund.com, bank.com, ad.com will never have household recognition because its to generic.

To answer your question, no the amounts being offered will not get me to the next level.

I'm not partial to that name but my recommendation is to sell it and come up with another name later. Branding is what you make of it.