So I’ve found a small coin making method…
Sugar Rush 88’s are selling for about 16k, 14.4k with tax.
In order to do the set for them, you do 1 86-87 (3k) and 3 84-85s (1.5k each) all of this adds up to 7.5k.
14.4k - 7.5k is 6.9k coins profit each time, and this adds up over time.