Very nice!
Though I think it could be better, if you made the sitting persons in a bit other positions - their head turned differently etc. :)
I love all the details.
I think however that the scene is enough rich of many different elements that if some are repeated for obvious necessities. It is true that some elements are copies, but a tent is roughly equal to un' other tent and an auction stringed in the land is equal to un' other auction and thus the plates, glasses etc… but, the characters are all various and in it placed various and the mules too. (the mule watches ahead and of side, mule with bags and mule with barrels, three various types of barrels, two various types of pot of clay, two various types of shield, helmet ahead and helmet of behind). 
Sorry for my bad English 
I really like how this turned out. I especially love the tents.
The trees and background fence are rather noisy though. I'm curious as to how you developed them.
I'm impressed... =8-D
Considering your iso skills (I've just looked through your gallerey: I'm wowed!), a few things might be improved... ;-)
Some multiple elements are just copies (trees, tents, poles, shields): it's nasty to the eye when seen.
The tall poles miss a rounded top. The shadow inside the tents should not be so straight.
The front borders of the piece are uniformly thick except where they seem to disappear. Maybe an irregular border like your 1st gladiator piece would be an option?
I'd sure like to see all of these Roman pieces brought together...
very nice! ^^ nice eye for details!!..... but i dont rly like the humans, i think u could use less colors on them, coz they look kinda blurry now, but anyhow very nice! ^^
wow nice.