New t206 collector - pricing question

[Wookjie17]

Hi -

Recently started trying to build a legit t206 collection after sitting on 2-3 for many years.

I am not in it for resell value, so I am not opposed to altered or 1s/10s or 2s/20s with nice eye appeal. Trying to stay away from absolute beaters.

I do have a good understanding of relative value between players, different backs, etc...

But - wanted to understand why I am seeing such huge spreads on eBay for similar condition cards. Taking PSA 1 or 1.5 for example, all things being equal, ranges from $22-$30 to $50-$60 to more in some cases

The lower priced cards may be people dealing with higher volumes, but even so, seems to be no agreed/settled market rate for commons.

Any thoughts on this observation and any guidance on what realistic expectations should be for low end graded cards?

Thanks all for any feedback