It's hilarious how uneducated you are on this. Have you ever pressed a record?
Comparing a new release to a DW reissue is hardly apples to apples. You are discounting several costs.
Mastering costs money.
Art costs money.
Recording the album costs money.
Promo costs money.
Converge has the unique opportunity to master the albums themselves, release it on a label owned by the vocalist, have it mastered by the guitarist, and record everything themselves.
I'm not disagreeing that $30 is a high price tag, but to simply say "Converge can put out a 2LP for $18, so everyone can" is just.... Well, ignorant.
I always find it hilarious when people look at a pricing matrix and think to themselves - "OH IT ONLY COSTS $10 TO PUT OUT A RECORD - WE'RE ALL BEING RIPPED OFF" without taking into account all of the costs that made placing the order even possible.