I have 4 USA-made #10-24 taps from my late father's machine tools.  They are from a couple different manufacturers.   All are 4-flute with two tapered and two plug type  Three look like new, one is probably used but looks good. I am selling these individually, but if you want more than one there is a discount.  If you buy and have a preference let me know, otherwise I will pick the best looking tap of the remaining inventory.  Shipping will be free within the USA via 1st class mail.