^^^ depending on how they were made... The folded 10-20-30 folds or sumting like that. are not cheap...well I don't need to explain the works... You guy might know better then me.
I don't know if that store is even still around. Had those blades for more then 10+ years. I have all them oil and powder to shine the blades from rust.
About 4-6 months I pull it down and wipe and clean them.
Some can go as high as 1000.00-5000.00,
Just as much as my 2nd wife.. hehee, BTW she's lock up in her case.. LOLz..