I can provide some insight as I have done this very thing. PSA 10s are available from about 1984 until the mid-2000s at a relatively low cost (with a few exceptions, (91 Griffey, Jeter (exploding), Riveria). Before that they are cost prohibitive (in my view). And after that point the reduced quantities, SP and SSP issues arise which make some of the new ones much more expensive, even for the base cards. I only want HOF RC so I am very limited. On some of the newest cards I have been trying to get a strong BGS 9.5 and converting them -- as the cost savings is worth it if it works. Will report back on my luck on that last one.
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