Think any artificial limits are silly, Sedo do this and it makes a lot of names difficult to list with them. e.g. you list a name you paid $15k for and it tells you the most it can be listed for is 10k. You end up just not bothering listing that name, it ends up that lots of names cannot be listed easily.
Just as an example a crap name listed for for $1million looks only very marginally better than $150 million. So where do you draw the line, a lot of names would look silly at 20k for example. How low is the limit going to go before it makes the marketplace look more credible and at that limit what is the effect on high quality names?
At the end of the day though what is the point of even listing on Netfleet? What are people hoping for listing with them, do they have any distribution at all?