Looks good. Does it come with the skimmer? Price looks OK. If you are looking for a sump. I would not use it. JMO. I would only use it as a refugium with a skimmer like it is. Refugiums tend to work better with less flow rates than what a sump usually turns over. Just for example an average 100 gal sump wet/dry will have a return pump of around 600-800 gph. This kind of flow through a refugium would be crazy. I could only imagine plants getting in places they were not ment to be. and sand or mud all churned up.
It does look like a good refugium if you add it to a sump. Again price wise I guess it is in ball park. I just don't know how well that skimmer works. I just bought a used percision marine skimmer myself. I had a chepo, and I don't think it worked all that grate.
I also have a refugium for sale in the classifides add on this forum or do a search of my user name and it should pop up. Mine is new,but doesn't have a skimmer. Or you can PM me for a link. I just posted it on ---- a little while ago.
Good luck.