You can check these against the NGC value (link I sent you earlier) - but most any of these at $25.70 is a decent deal, as they are worth from the high 30's to the low 40's and up. (albeit, if you try to sell them you will be dealing with other bargain hunters, so consider that)
I bought a truckload a couple months ago at $19.45 each - sitting on them.
note: They also sell PCGS, perhaps the premier grading service and usually worth more.