I'd have to echo Peng here, but go a little further. Your freestuff shows you've still got a long way to go before being store ready. Same with the pinboard. The textures need to be thrown out and new, hi-res ones need to be made. The modelling is very simplistic. Consider looking into displacement for the cork. Make other options like suggested above ... the blue boards are made from low pile carpet and are usually frameless. Can the frame be made invisible and the board still look good? Perhaps a frame with a bit of routing (shaped edging) along the edges?

Consider modelling & texturing for at least another 12 months before thinking of the store. Do you want to introduce your talent as lacklustre? Or would you rather explode onto the scene with an awesome piece that everyone 'has' to have? Reputation is KEY in this industry. Look at a modeller like Stonemason. People buy his stuff purely because he made it, so they know it's top quality.

I hope I've not offended you. When someone asks for an opinion I assume they want all opinions, not just the one they want to hear.
I was told these things a long time ago, and I honestly believe I make good money from this now because I listened and honed my skills before entering into the marketing side of Poser.