British war helmets from WWII are little cheaper than those of WWI according to my research on all completed sales on eBay on the last 90 days. WWII helmets are traded every single day with minimum of 10 bids, which means there are great number of engaged buyers and sellers. You can expect to pay anywhere between $50 - $300 for a helmet based on condition & rarity.
If you are looking to buy a British helmet, you will have to join the bidding war. For example, on September 12, 2010, a WWII British helmet was sold for $267.88 with 24 bids. Take a look at the helmet on the right. It is not in great shape, but still goes for high price because of its rarity.
eBay is indeed the best place for searching WWII British helmets for sale from various sellers and collectors. I don't think there's any other place like it. Below are some of the listing from eBay. Browse the the listing and click on a link which you are interested in. You will be taken to a page with more information on the helmet.
BRITISH WWII 1942 HELMET IN VERY GOOD CONDITION
$30.00 (2 Bids)
Time Remaining: 4h 40m
Original WWII British Brodie Steel Helmet in OD Green WW2 Dated
Time Remaining: 27d 17h 32m
Buy It Now for only: $79.95
British WWII Brodie Helmet Replacement Liner Size 7 5 8 61 cm
Time Remaining: 29d 4h 2m
Buy It Now for only: $34.95
Vintage WWII British Paratrooper steel helmet
Time Remaining: 3d 8h 18m
Original British WWII Brodie Helmet Chin Strap
Time Remaining: 19d 6h 30m
Buy It Now for only: $29.95
BRITISH WWII KOREAN ERA MARK IV STEEL HELMET W LINER CHIN STRAP GOOD COND
Time Remaining: 3d 11h 7m
African Campaign British Helmet WWII Original With Liner Strap SEE ALL PICS
Time Remaining: 16d 9h 59m
Buy It Now for only: $40.00
British WWII Paratrooper Steel Helmet
Time Remaining: 16d 6h 29m
Buy It Now for only: $94.95
Here is a list of previously sold British helmets on eBay. Use this as a guide so that you don't pay too much for a helmet in the future.
- Dispatch Rider Helmet 1945 - MINT : $200
- Paratrooper Helmet - REPRODUCTION : $157.50
- Tommy Helmet - 1942 - GOOD : $142.50
- Tommy Helmet - 1942 - GOOD : $79 (notice the difference in price. I checked the auctions and both are almost in same condition. If you shop, you can still buy the helmets for cheap)
- Motorcycle Helmet - 1945 - GOOD : $112.50