I'll give you Dragon Crap for your 20 keys, if you eat this crap, you will get EVERLASTING immortality, BUT WAIT THERE'S MORE! YOU will attract all females that are WITHIN a 100 mile radius!!! Beeeest! Deaaaal!!!! Everrrrr!
Doubt you could get a cool deal for the 20 keys, think u better sell them separately for cats or something, hurry up or they will expire
I can write a PIMD rap song off the top of my head for your key. The name of the song will be titled "I'm Batman"