Do you have a stand and sump and ... you're going to use (such as what your previous tank was using) or are you trying to get another tank setup?
That matters in that matching everything up is easier if you buy a new one and can just find the exact size and setup you need. If you're more flexible, you definitely can find really check deals on here and the previously mentioned places.
I'm still in the camp that believes Red Sea is fine and the issues people see are before there's at many of them. However, my belief in that is wavering with the large amount of seam issues on this forum in the last year or so. Feels like one every couple months, and always Red Sea. That's likely exacerbated by what was mentioned once on here that maybe it's from not great moving in comparison to the way they come new.
There's always a lot of rimmed Petco tanks and Red Sea tanks on resale places.