Purchase fails made correct by a seller

When I pick up some cheap-o cards from an online card outlet, I usually let the incoming PWE sit loose after I open it up and briefly scan through the contents - I think it's pretty neat that I can pick up certain cards impulsively, though maybe it gets tricky getting exactly the odd cards I want, in a presentable condition.

On a whim, I took a closer look at the cards shipped to me from an order and go figure two of the cards I threw in to maximize the shipping rate were damaged - the 1991 Classic card of Will Clark I picked up for about a quarter has some residue and staining along the right side while the 1991 Classic card of Tim Salmon for a quarter was creased.

The seller even put a 1991 Classic Wes Chamberlain card as a dummy protector card on top - but both cards may have been in garbage condition even before they were shipped out.

The 2010 Topps Update Tales of the Game Joel Youngblood and 2017 Topps Update Johnny Damon that might have been the centerpiece purchases [yeah at another quarter or so each] were jammed in another semi-rigid holder [which is often the case more than not] - maybe they were subject to some of the conditions as well, but being ‘newer’ cards, they otherwise still look okay.

Assuming there were no problems with the cards in the first place, I already left feedback - I figured I basically ended up paying more for the two cards I really wanted, but ended up contacting the seller, where credit for the two damaged cards was added to my account.

Now I wonder if I'm going to use the credit to try and pick up similar copies of the Clark and Salmon cards - or will my $0.50 credit go into something else entirely.