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If they were all different and the guy was willing to sign them, I'd probably see it differently. 3-4 different cards x10+ copies each screams "EBAY" or future ebay.
I am one of those guys who will try to get as many different cards signed and in some cases i do hoard certain cards (great action shots, certain years like 56, 78, etc). However, the difference is I buy them or trade for them 99% of the time. The IP autograph opportunities I have are all those minor league signings in Everett I have gone to over the last 3-4 years, 1 per year mostly and I will admit have tried to take advantage of the opportunity when I had them, maybe to the appearance of excess to those who might be watching me from afar.