RRR is "...seeing them..." and knows where to find the antenna, but based on his/her request is unable to search or call to find out a lower price and needs assistance. Perhaps he or she is looking for the new Larsen NMO-150/450/758 with the spring for a price lower than $50, as this is in the scanner equipment sub forum.
Please confirm or advise of the antenna model you are interested in. Happy to help.
I did notice an eBay listing on that antenna being sold by Antenna Farm for the same $49.95 price, but with free shipping. That listing also shows out of stock, no surprise, but if you can wait June might be the date for eBay and free shipping.
P.S. Someone on eBay is asking $75 +$10 shipping if that makes the $50 price look better.
Larsen NMO-150/450/758 - This model has the spring which is shown in the image and was being sold by The Antenna Farm for $49.95 and free shipping. Perhaps I should have posted that link to avoid confusion one may have with the old model.