Speaking in terms of the nostalgic "Good Old Days", have a 2003 Tapco catalog here with the Chinese spikes for $4.99 ea. and I remember when Sportsman's Guide would sell them as low as $3.00 ea. when sold in multiples. I think I bought a bundle of 10 spikes for $29.90!
So, yeah, $45.00 is sure a sign of the times.
firstchoice