looking for a good site to purchase knives such as zero tolerance, hinder, boker, mirco tech, etc

Blade Headquarters and Knives Ship Free are two I've used. Both are well established, good reputations.

Knife center, Blade hq, knife works, knives ship free, dlt trading, smokey mountain knife works, American edge.

Eknives.com is my current go to with a close second to dlttrading.com.

Eknives doesn't charge PA sales tax, and they also give me a 10% military discount. Both offer free shipping if you spend over a certain amount. Given the knives you mentioned, they will ship free.

Both ship amazingly fast.

I have used knivesshipfree and dlttrading both were good experiences

And, if you don't mind one that someone else has broken in for you, Blade Forums sells a LOT of knives, name brands, fixed, folding and autos.

Most ads have pictures and one can see the selling pedigree of the person offering the knife for sale, their length of time on the forum, their past selling history and reviews, etc.

Certainly has saved me many bucks on new/like new blades over the years.

Bob