IMHO, if you want LHD, buy a LHD, if you want a RHD, buy a RHD. If you have one and want the other, don't swap, sell then buy.
RHD is novel, it's fun to have the dog sitting in the passenger seat while you run around town, everyone does a double-take. For drive-thru's, just drive through it in reverse.
My Series happens to be LHD because it was the one I found at the right price at the right time, but, I'd wouldn't have minded a RHD instead. Yeah, they're a bit different, but, that's why we're looking at Series and not CJ's, right?
If you have two Series, side by side, LHD and RHD, for the same price, I'd pick the one that is in better condition, and not based on which side the steering wheel is on.
FWIW.