I've just ordered a new Hitachi compressor from a well respected supplier but the notice from the courier states it's coming from, in my opinion, a supplier with a less than a good reputation. So with so many of these for sale at different prices, how can I be sure that it is in fact new? Range Rover 4.2 SC
2 Range Rover Classics - one from new but both rusty now.
Rover 3.5 Coupe had since new.
Subaru Legacy 3.0.
BMW K1200RS.

Just send an e-mail or call the company you ordered it from, it could be that they were out of stock and sourced it from somewhere else to keep you happy ?

Once you receive it, a good look should tell you if it's new or not, plus I assume that new items should have extra paperwork included, such as a guarantee.