When I got my first englishes, they were not in the best of shape as far as showing goes. Good bodies but their ears had taken a beating. Which was OK, I was just tickled to have found them here for sale at that time. Their ears where bothersome to them so some had become chewers, attention and care, no more problems. This is not always the case, some become chewers no matter what and will not stop. I highly suggest asking and looking at lots of pictures from the rabbitry and line you're interested in. RESEARCH on lines, health of lines, and durability of them is a big deal with these guys. It takes a long time and I wish it'd be some thing more people would do and even consider doing in other breeds as I'm sure it'd help curb some first year blues.
Does breed at 8 months or so, not before. Ears have to be 21" even on JRs (this is EL of course). There's tons of colors, but as Dood said, there's a niche market. Either you've got some people want and will pay, or you don't. Selling cheap 50 or 40 EL to any one with cash isn't going to get you any where with the breeder you purchase from if you paid 400 for a pair or some thing like that for example. Some breeders, especially the better ones, are STINGY with GOOD stock. Waiting lists are not uncommon and neither is not being able to get any juniors until at least 16 weeks of age when they have roughly reached their max ear length, they can gain a bit more with head development etc but won't be like the jr growth span.
Hands on is a must with these guys, bone quality is super important to avoid problems with spine and assure the rabbit is a good one. I purchased a few "cheap" ones, 75 to 80, that looked good in pictures...but once I got my hands on them were boney and thin...no good for breeding just pets or chow sadly. This is one breed I do not suggest buying from pictures alone unless you have no other choice and the breeder is a good (not just says but other people know or you see them listed with others without being asked type of good).
They do not deal well with sudden change and have been prone to GI upset more than any other breed I have had, even Holland Lops. I stopped treating and terminally culled early on so I stopped seeing it pop up as bad in my own breedings (VL and EL). It took 2 years with EL (now I'm sold out of them) and VL are still a work in progress (just got fresh stock 2 months ago as I had sold couldn't get relatives back/terminated others...seeing how she goes this time). I think this is one of those bad things with the limited gene pool that Dood is speaking of as well. There is just not enough "space" of good to weed out "bad" in some areas.
I never had any feet issues with either, but I was extremely picky on feet/bone/fur coverage and didn't get the what I could "just" afford really, I saved up. Even my firsts (good bodies, just ears had taken a knocking) were over $300 for a quad...they are not cheap, they are an investment. You buy low from some one who doesn't keep like you intent to keep, going to have a ton of problems. You don't want to get some that are cheaply bred and have a lot of issues...no thin bones no pigeon breasts cow hocks thin pads etc. There's going to be faults, but you don't want to start with ones with major body issues even if their ears and coats are great. I worked the other way, I think that's how I avoid and still avoiding with VL a mass of problems others have.
They are DEMANDING if you cannot let them out and play, don't bother. They will hurt themselves out of boredom. I know some people keep them out in the winter, and do fine...but they always got too cold here and ended up chewing so I keep even VL in. I no longer have EL though some day IF all this other stuff going on settles I may try again. I had 4x3" cages for my EL, 4x6" for my does with litters and kept a SMALL number. I DID have problem with hay guts at one point, they wanted to eat nothing but hay, get pot bellied, and then they'd be no shape for show's sake....judge in OH pointed out and asked me what I was feeding, as soon as he heard they were getting hay and unlimited food told to cut back to just hay a few times a week at most as they can be picky glutton eaters. After I did, no more hay bellies.