I ended up with enough to last me several lifetimes. These are top quality bi-metal blades which sell for around $2 each.
12" x 1/2" x 18TPI Lenox p/n 20116-218HE
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Including Priority Mail shipping in the US: $20 for 20 blades $40 for 50 blades $70 for a package of 100Paypal is preferred, but *do not* use the email address on this post.