Thanks for the recommendations. (I know Wality and Airmail, we have used them as give-aways.)
I have a Wality 69T (I think it is) - and I have to agree, it's a very nice pen, especially for the price. Better quality (in my experience) than the Camlin and Serwex pens I've tried, especially the nib. I don't know whether the economics would make sense, though, in terms of importing to the US and reselling to a local market.
Gama is another name that I've seen reviewed a lot on FPN, and their pens look to be pretty good quality.
I have two Ranga pens - a 'Cruiser' and a 'Duofold'. Both lovely pens, but the Duofold in particular is an amazing pen.
I'd also suggest checking out the Triveni (and Triveni Junior) manufactured for, and sold by, Fountain Pen Revolution - they're a little thinner than the Gama Duofold, and not finished (in the case of their ebonite pens) to quite the same standard - but for the price point I find them very hard to resist!