I think, you should be able to sell item A on OCRP, for eg; a gun. and buy said item on HRP, this will obviously be more expensive for the gun dealer, but will have some stat boosts and be labled as 'high quality weapons'. The supply of "High Quality Arms" varies on the supplier on OCRP making them, and selling them. This will all pool together, and the OCRP players would get a share. A supply and demand type of thing. The higher quality guns would have a higher price, and demand, and if demand outweighs the supply, price goes up. And the players on HRP can sell fish on the inter-server economy, to be bought on Space Build and OCRP. In the latter, for some health boost, in the former, to feed a hunger bar to survive. If the former is established in such a manner, then they can sell space ore to lessen the price of metal in OCRP and the price of standard 'cheap' weapons and fishing equipment?
Well there's my few cents, I think it'd be FUCKING AWESOME.
bump
Look, we can do so much with this. Encouraging playing on every server (save for HL2RP). For people to start companies and gangs to help support this sytem, this could create intresting RP.