CRH seems to be a hobby all by it's self . I've never seen the relationship to metal detecting other than the fascination with older or collectable coins . From what I've read on another forum , the practice of CRH seems to strain ones relationship with the bank of choice . I assume it's because of buying to much of their coin supply in one transaction ?
Most times you buy full boxes and then some to hope to MAYBE find one desirable old coin. Many more times you buy boxes and find nothing. As noted above be careful to my turn your supplier into your dumping grounds. As far as buying, no one has ever hassled us about ordering boxes, they just politely ask that they don't ever see those coins back in their banks.