Valve rarity question

[LGAFF]

In the auction I bought 32 Valves and keepers......

Was wondering, is this something I should hold onto or is there some availability....how hard is it to change valve size,etc

[Polo-1]

I still have a few left over.... I never used them, someone always needs 2-4 valves. I sell them cheap as they are good used parts. Had them for over 8 years now.

I think when I talk to Greg about oversized he wanted to pound in new oversized seats to match. I dont think he wanted to cut the stock seats out to fit the bigger valve.