Get a Rain Check at Market Place

I haven't made it to Market Place to get my 98-cent Domino Sugar and I'm afraid it'll be wiped out by the time I get there this afternoon!  No worries, though, because if they are sold out I'll just get a rain check and hope that it restocks before my coupon expires!  Not sure if the Rain Check itself has an expiration date, some places give you 30 days to use it or lose it.  Gotta love those Rain Checks!