Mantle cards as investments

[ALR-bishop]

Larry S ( sflyank) has raised this question before. Given the increase in his Topps base cards reflected in the article and in particular his 52 card which is certainly not hard to find, why has there not seemed to be a similar jump in his rare or scarce Topps items that would be on the list of any master Mantle collector...such as Topps 61 Dice, 63 Mask, 66 or 67 Punch Outs, 67 of 68 Discs , or 67 Stand Up. All of these would fetch a high price but probably no where near a top notch 52 card

I get that odd ball items are not as well known in general and so demand is less, but Mantle collectors surely know about them and getting some of those items is next to impossible. Just a matter of curiosity to me.

These things do not come up often and given the current Mantle market if they did maybe the prices would be significantly higher than in the past