The Mets Charge a $5 Fee on $6 Tickets

It took me 6 minutes to get through.  I ordered my $6 seats for Friday.  I am admittedly cheap.
 
They charged a $5 order fee.
 
So my $12 in tickets cost $21.  That’s a 75% markup isn’t it?
 
Does it cost $5 for the computer to take my order?  Do the Mets use designer envelopes?