Glad you are getting some silver for all the work you do.
Do you know how long it takes for your dumps to come back around generally? Since you are doing so many boxes per week, I am curious how long it takes.
I am seeing my dumps come back (I recognize some unique coins) sometimes quick (in 2 to 3 weeks). I only do about 4 boxes per week max, and sometimes less.
that's a hard question for me to answer. first of all i don't waste time marking coins because i figure i am bound to get some of them back. but if i had to guess based on some of the markings i do find i would say about a month. there is a guy here that marks coins with a green sharpie on the face of the coin right at the base of kennedy's bust. marks with a swiggly line. i get some of those about once a month, and the other marking i get around here alot is a red sticker on the reverse advertising a pub in south carolina (aunt somebody or another's easy st. cafe) unsure of the real name. got some of those this week and have not seen any in about a month.
the real problem as i see it around here is the guy that was my main competition. he would pick up 30 boxes a week from the main branch of my supply bank search them and return them to the same bank. he really mucked up the boxes for a while, but i was told he is no longer getting boxes (at least from my supply bank) anymore. the fact that he stopped tells me he was skunking out too.