I'd nominate Ropp as underrated. Some have mentioned them in a positive light over the years, but they are not big favorites here, I don't think. I have only one, but it is well made and a good smoker, as are most French pipes.
Another brand in the shade might be GBD. I was interested to see that G.L. Pease is a GBD collector. Apparently it has the reputation of being somewhat staid and clunky, though durable and traditional in design, but he has a collection that is comprehensive and impressive. A fine old English pipe brand that. I don't own any of these, but have too many pipes already.
Hardcastle is another sturdy English brand I don't have. Iwan Ries, for years, had a row of them for sale with copper colored bands for $40, but they are long gone, probably a good buy.
I got a couple ropps in lots I've bought. They seem like sturdy pipes. I don't remember if any were usable. I'll have to recheck.
From what I can remember they were either beat to death, cracked from way too much cake, or the shank was cracked or broken.
I think I might have 1-2 that might be usable. I bought a bunch of lots. Many were around $20 with shipping. Think I got a couple for $10. You won't believe how many stummels and pipes I got for under $10. Many under $5. They were ¢.99 + shipping
Most weren't Sasienis, Stanwells, GBDs, or the like. But i did get lucky with a couple. They're more along the line of Grabow, Kaywoodie, Medico, Cary, several metal types, Rogers, Willard, and too many to remember.
As soon as I get organized I'll post some pictures. One good thing came out all this. I've had a Foredom type rotary tool. It had a plug with round prongs so it wouldn't work with the vintage Foredom foot controller. So I had to swap out the plug. All I need to do now is clean and relube the shaft.
I never got around to it because I didn't need to use it and was afraid it wouldn't work. But it works great. Brushes are like brand new. It has a great Foredom hand piece. Now all I need is to get some polishers and abrasives. Good ones, not the cheap Chinese ones that came with it.
You can run it really slow. thought it might be a handy polisher. Not sure if I want to try using it on pipes. At least not until I'm more comfortable with it. My dad had one I used on models. But I haven't used one in forever.
I also got a polishing set for my drill. I have a drill stand. Turns your drill into a drill press. I needed to buy a work table. Found one for $20. I got a bunch of tools and sanding stuff to restore the pipes. Figure I'll do 10 at a time. No need to rush. I'm going to get a rheostate switch. The kind you plug lamps into. It'll give me speed control for the drill. I've done it before. Since most drills have speed control with the trigger it works fine.
Can you tell I've been bitten by the bug? I'm at my limit though. Unless I want to die in my sleep, I can't buy any more "pipe stuff". I can buy stuff if it can be used around the house to fix things. But she was very clear about the "pipe stuff"!!
So how do I convince her that a stem cutter can be used around the house? Its $70 at Vermont free hand.
Thanks