Custom Used Aquarium Pricing
The following are a couple used aquariums varying in size and quality. It will give you an idea for pricing. All of which are WITHOUT fish and coral. I will continue to research and get a better answer for you.
$59,900 on ebay:
This is a 6ft by 9ft by 4ft 1,108 gallon custom aquarium:
http://cgi.ebay.com/The-Ultimate-Aquarium_W0QQitemZ140312506599QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item140312506599&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A3%7C39%3A1%7C240%3A1318#ht_565wt_1167
830,000 on ebay:
The following is a 6ft by 6ft seamless tank (cylinder) without a top or base:
http://cgi.ebay.com/Custom-seamless-acrylic-aquarium-cylinder_W0QQitemZ280332946080QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item280332946080&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50#ht_500wt_1182
$13,665:
A 10ft by 4ft by 5 ft rectangular aquarium that holds 1320 gallons: http://www.fishtanksdirect.com/index.asp?PageAction=VIEWPROD&ProdID=722
$10,872:
A 10ft by 2ft by 5ft rectangular aquarium that holds 625 gallons: http://www.fishtanksdirect.com/index.asp?PageAction=VIEWPROD&ProdID=707
$10,500:
This is a 7.5ft by 8ft seamless tank (cylindar). There are no photos and a very inconclusive description other than it would cost $26,000 new:
http://www.getahugetank.com/used-tall-seamless-cylinder-aquarium-p-2568.html
It is very difficult to find custom aquariums for sale. I will continue to research for you. I hope this helps!
The following are NEW custom tanks varying in size and cost. I thought it might help to get a cost in mind: http://www.getahugetank.com/aquariums-stock-c-250.html
Best,
Story