For sure Rainer,...me, and just about everyone I know has had this sort of thing happen countless times. The part you said about.."you can't keep everything" is just plain pure fact!, and I say that same thing all the time to people too...LOL!
As I remembered it, when I said..."what's the deal with these two here?", and you said.."just plain brooks, they probably won't sell at all because they aren't het for anything, everyone wants to see a VISUAL morph, not normals", then I said...."not het for ANYTHING?, okay!,..SOLD!"..LOL!
What really took all the time was waiting for you to come back from getting some food to eat as I sat there watching your table..

Seriously though, as you said, I am always very choosy about any animals I ever acquire, and I did think it over very carefully for a bit 
~Doug
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"a snake in the grass is a GOOD thing" 
my website -serpentinespecialties.webs.com