I mean its just a Fluval 13.5 right? Lets see if I can put something together for better than that price.
Tank/Return Pump/"Filter"/LED Lights - $190 on SaltwaterAquarium
Fluval 50w Heater - $16 on
Amazon
Aquanet Thermometer - $7 on
Amazon
Hydrometer - $7 on
Amazon
10lbs Fiji Pink Caribsea Sand - $16 on
Amazon
Red Sea Coral Pro 55gal bucket - $35 on SaltwaterAquarium
10lbs Live Rock at local LFS - $6 per pound - $60 (I know its not online, but I can't find a Live Rock by the pound online quickly, so I'm just using my LFS price here)
Livestock is where it gets tricky as everyone has different prices. Just to pad the total, I will go to SaltwaterAquarium and order ORA fish/corals and a basic cleanup. That will qualify me for free shipping if you order all at once regardless that you wouldn't add all the livestock at once.)
ORA Ocellaris Medium - $18 per - $36 total
Rainford Goby (SA doesn't carry ORA Rainford. Avg goby price ~$25 so I'll just leave it up to owner to pick) - $25
10 Gallon Beginner CUC (5 Hermits, 5 Astrea, 3 Nassarius) - $40
Toadstool Leather - $43
Zoa (SA Has Orange right now, but hopefully they would have other colors at different times) - $44
Kenya Tree - $40
Xenia - $40
(Really limited on Softies at SA. Most have same color palate. I tried to chose different shapes and profiles even if the colors would be limited. Also I completely realize that at least some of these would be available cheaper at LFS especially the Xenia)
Total Live order (Needed $179 for free shipping was achieved) - $268
Total Setup - $599