You can ALWAYS check the current price of any Lotus part by looking up the part number and then going to DeRoure and searching there:
http://www.deroure.com/DeRoure uses the current prices from Lotus for their pricing. They also include ALL of the obsolete and NLS (No Longer Supplied) part numbers, so you can see if the part is available and what the current price is.
You WILL be charged VAT if you are in the UK or EU but WON'T if you are in another county like the USA. Postage to get it to you is usually fairly cheap as the UK has a great courier system.
I usually order multiple times and my dealer generously holds the parts in storage while I collect a decent size shipment before packing it up and then I send a courier to collect it to get it over here.
I have worked in auto parts since the mid 1970s, so I am comfortable with the process. It isn't difficult, but you have to check and verify if the part you want is still available and what the best price is that you can purchase it for. I sometimes just google the part number and come up with a dealer that is letting a part go for their original cost or less to get it off the shelf. I have a fairly large list of part numbers as well as GM Obsolescence sourced parts and the standard "replacement" parts everyone is using that I offer to any Lotus owner. REMEMBER, getting a big and heavy box shipped from the UK to the US is not cheap, so expect the price I might quote to include all other costs I incurred to get it to my shop.