Oh, Greg, did you see that you can get those baseplates / a selection of other sets in the 2 for $29 deal on Walmart.com?
http://www.walmart.com/ip/LEGO-2-for-29-Value-Bundle/31031383
You pair a $20-30ish set with a $10ish set (or baseplate) and get both for $29. So, not too shabby of a deal.
(I swear I’m not just shopping online for LEGO all day – it’s just in between family hangouts / farewells / etc.)