When your looking at used equipment you want do make sure that you are actually getting a good deal on it. This usually means evaluating the equipment and considering it you can live with it or you would replace it. For example, in what is being offered, I would likely want to replace the lighting and maybe the sump. Because of this, they are worth nothing to me. Also, anything that is broken is worth very little. Sometimes you just can't get the replacement part you need. Also, consider parts you will need to replace. For example if it's T5 lighting, you'll need to replace the bulbs.
For everything that you will use, figure out what it would cost new and total it up. Deduct for any replacement parts you will need. Generally I figure used equipment in more or less perfect condition is worth only about 60% of the new price, maybe a little more if it never been used and less as it shows more wear and tear.
Then once you figure out what it's worth, consider the asking price and see if it's close to what you figured. You'll sometimes find your getting a great deal, other times the seller wants way mor than the equipment is worth.
The bottom line is that there is no yes or no answer to your question, because of all the factors outlined above. You might be content with equipment that I would feel needs to be replaced. The condition of the equipment may be better or worse than expected.
