In 1982, I received a White's 1D/B for as a Christmas present. Total cost of the detector was, if I remember correctly, $119.95 back then. One of the first coins I found that year was a 1794 Large cent somewhere between VF and XF condition. Total value of coin back then I think was about $200. Not bad for a 12 year. Still have the coin and today, depending on who you ask, its worth anywheres from $1,600 to $3,750.
A few years later, my dad bought me a used White's 6000 DI. Shortly after getting the new/used detector, I found an 1871 Indian head in XF condition, which again, paid for the used detector. This is also my favorite find, because as a teenager back then, it put me one step closer to having a complete set of Indian heads, and it was found while detecting with my favorite partner, my dad.
Anthony