At $2.50 each, that would be about 86.5% of melt as of today . In my opinion, thats not a tremendous bargain, but its probably a better price than you'll find at most places. Personally, if I could part with the money without impacting my ability to buy more later (if silver takes a dip, I do find a tremendous bargain, etc.) then I would buy at that price. If the purchase would hinder me from buying more, or cut in on my CRH bankroll then I would probably pass and hope for a better deal down the road. If the dimes were Mercs and Barbers, I'd buy and have a blast looking for key/semi-key dates.
But, thats just me. Its your money - do whatever you're comfortable with.