I'm instantly getting at least 2 more retainers. That's about 450 inventory slots and 40 more sell slots for money, so worth 4 extra dollars. If you wanna cry about adding 4 bucks you must live in a 3rd world country. The sub is 15+(2.00xNumberOfRetainers) so 8x2=16 15+16=31 or, 3.5 hours of work a month. Wow so expensive.