Best crib mattress for grandparents house?

[ilovetivo]

So looks like the Kolcraft foam one is NLA. Is the Colgate Classica I the next best choice in value? Babycatalog has it for $80 (- my 10% member discount + $16 shipping). I wanted foam. TIA!

[WooChx]

The cheapest one is the best for grandparents. It won't get used as often as the one at home. Target has some very good ones for about $50.

[ilovetivo]

are they foam though? thanks!