Matt, there's no value in new turntables because of the following reasons:
1. no matter what price point, there's something you could have bought for less money - sometimes a lot less - that will sound at least as good - often much better.
2. the vast majority of modern tunrtables are belt drive. That's fine if you like belt drives as a breed. I personally prefer direct drives as a breed for their generally crisper presentation or idlers for their more propulsive presentation.
3. Depreciation. If you have your heart set on a modern vinyl source buying it 2nd hand will save you money. Any turntable worth having will last for many years before it starts getting worn out. Cartridges on the other hand are consumable items and sometimes you might as well buy new as 2nd hand.
VOE, modern Regas, Pro-Jects, OL's are OK. Put them up against, for example, a £300 Sony PSX 6750 with a £posh cartridge in and see which you prefer...
Neptune, I think $11,000 for an EMT 950 or 930 is too much. That's about 3 times more than I paid for mine, a few years ago. $11,000 would be a good price for an EMT 927 because they are such a rare item and have commanded huge prices for a long time. The thing with 2nd hand hi-fi is that you get flavours of the month / year / decade. Where the prices go shooting up. The wisest buyers buy products that are not FOTM. Or they buy at prices well below the current going rate. If you can buy a fully working EMT 950 with EMT cartridge for under £3000, or without cartridge for under £2500 then I'd say go for it.
And the BBC EMT's. Typical BBC. They spent all that money on lorry loads of EMT's and then went cheap on the cartridges, fitting inexpenive MM's to them. An EMT isn't really a full on EMT without an EMT cartridge on it.
Thorens and EMT were part of the same group of companies for a while.
It's a good question to ask at what price point I feel vinyl surpases digital. The thing with the 2nd hand hi-fi equipment is that it's all a big fat it depends because it's such an imperfect market. You generally don't get what you paid for. The trick is to get a lot more than what you paid for. You also have to factor in different people have different skills and abilities in doing basic repairs and servicing to turn ultra cheap non-working turntables into fully functioning mega bargains for minimal time and cost. Assuming zero DIY ability, I think that £500 to £999 is enough to get a vinyl source that will sound better than the sort of mid-level CD players that I have. If we're talking about an ultra CD source such as an Esoteric P01/D01 then I wouldn't like to say as I don't have enough experience of high end digital sources.
With that £500 to £999 it's vital that you buy the right turntable / arm / cartridge / phono amplification, and not just some mediocre sounding combination. It's vital that you do all the things to give vinyl a following wind - turntable isolation from speakers, clean unworn stylus etc etc.