dafuq?!?!?!
Yesterday I ordered an L3+ w/ PSU and shipping included for $1550 from giga-watt ( https://giga-watt.com/promo/prices ). Yes, giga-watt will be hosting it. Yes I have purchased WTT tokens which guarantee space and power. It will not arrive until 20-September or so but that's OK with me as I can not run it at home (electricity is too expensive here). Keep an eye on giga-watt's web page to see when they have L3+ in stock and buy from them. While you are waiting for the L3+ miner(s) to arrive buy enough WTT tokens to cover the L3+ miner order (see my sig for a referral link to buy WTT). Just remember that each L3+ requires 880 tokens.
There is no way that I'd pay USD4000-USD4500 for an L3+. If I was going to spend that kind of money for a miner, I'd be more inclined to build an open-frame GPU rig with six GTX 1080Ti GPUs and mine other altcoins. You'd probably have an better chance at achieving ROI. And at the end of the day, if you tire of GPU mining, selling off the 1080Ti GPUs will be easy.