I need help of someone to evaluate my products collection (CLOSED) (CLOSED)

I need your help to evaluate all my products ( modeling and price)
I haven't any sell a model from two years  ago 
How can I sell  a model now in this marketplace?

and this is my RH portfolio
https://www.renderhub.com/ahmed-shoukry1
Thanks for your advice

Looks fine to me. If you're not getting the traffic you expected or would like I'd say just look around at what others are putting up for sale. Or, as Sickleyield said... I found a niche, and that's what I do. You are making what looks to me, to be very nice models, but I don't need that particular piece at this time and usually don't with the way I work, but that is always subject to change. Try changing the focus of your next creation maybe, for instance; you have gorgeous models but, they're also large structures that I presume do not have usable interiors. Maybe make them modular so walls and ceilings are complete pieces that can be moved around, hidden, or used for more close-up work.
Just a couple ideas
goodluck, j

Your products and promos look pretty nice. However, I see most of them don't come with an obj file format. 
You should consider adding obj to all of them, as that is the file format most requested by customers.