$1500 is optimistic for either bike. Top selling price I've seen, for an `80-`82, was just shy of the $2K mark...for a virtually flawless, well-presented, `82 with less than 40 original miles. That was 10 months ago. No way either either of these could be brought back to the same condition for anywhere near that little, even with a $1200 selling price. The `80s models don't get much love but that's mostly about aesthetics, pure & simple. Mechanically, they're the same as the `90s bikes, but with 6v breaker point electrical setups. For someone relatively unconcerned with the resale/investment side of the equation, these models can be a lot of bike for the money.
FYI...that damaged speedo will be a far greater challenge than it might appear to be at first glance, on multiple fronts. Honda went to a translucent, backlit, dial in 1980. The markings are illuminated. That requires some fairly sophisticated graphics and they'd be an expensive nightmare to replicate, if damaged.
BTW, the English translation of "manteca" is "butter"...
