Hi OP!
Very sound advice above. If you have made up your mind, after all the considerations, to go for a TT, please do a lot of research and decide after that. All you have to do is basic secondary research (mainly online) and you will find tons of literature, advice, suggestions and reviews.Take your time and don't rush into anything. Following this, beware of relying too heavily on a single forum, even this one, and be cautious of remote buying, even if it from 'reliable, experienced' sellers on this forum.
I advice that based on my recent experience buying through this forum from a 'highly respected and reliable' expert. That it was disappointing, is an understatement. I briefly recount my experience for you -
I trusted this seller and bought an used Technics SL-D3. I did not even ask him for photos showing it's condition (which is my folly, I accept), nor did I haggle too much. I was happy to pay up as this was supposed to be a gift for my girlfriend and I needed one quickly. The price was a little above the fair price, as I found out later.
Anyway, I made the payment as agreed and received the TT (well packed and delivered personally, which was nice). It was only once I opened the box did I realise that I was a bit short-changed. The seller had mentioned that the cosmetic condition was OK, but it still was a shock to see a layer of dust on the whole TT (as you must know dust and TTs are mortal enemies) and it was rather worse for wear. But, it played alright.
However, the list of issues just grew: 1. The headshell was not original, 2. The counter-weight was not original and did not have markings (the seller had mentioned this, but not that it had no markings and thus I can not change the cart without a mini-weighing scale to set it), 3. a very basic AT cart with the TT which is worth much less than what he charged extra amount for (he also claimed, when I asked for which model the cart was, that he had no idea.... so much for 'expert' seller status). and finally the worst of the lot 4. the tone-arm lever was broken (which had skipped the seller's memory, as he claimed later). This meant that I could not skip tracks or place the arm where I liked on the record.
I have been pursuing the seller on all these points and have not had any concrete solutions, in fact, he has stopped responding to my messages here on the forum as well... so not much hope anyway. All in all, a very money-minded transaction, which left a sour after-taste.
So, though I am not brushing them all in the same cynical brush, I most certainly advice a sense of caution before walking into what could be a bad first experience. Be a little vary; all the camaraderie and bonhomie will disappear when it comes to selling, buying and profits. It is better if you can meet the seller, check the TT (maybe with an experienced friend) and deal directly, especially for your first purchase. Good luck!
P.s - There is a lot of discussion over vintage used TTs vs off-the-shelf newer models. Make an informed choice. I have been in the UK for a while now and brands like Rega and Project are not and can't be easily dismissed as is the trend here. Am just saying, do your research.
Finally, anyone wanting to know more about the seller I have mentioned can PM me. I don't want to vilify anyone publicly based on my personal experience, that is not my intention for this post.