I discovered that real Tamaya marine sextants are available on eBay for $100-150. They were 30x that new. My understanding is that the sextants are coming from

I discovered that real Tamaya marine sextants are available on eBay for $100-150. They were 30x that new. My understanding is that the sextants are coming from breaker yards in India where the sextants were left on ships and salvaged.