Disagree. Incomplete is incomplete. You still have to put SOMEWHERE on the listing that logs are incomplete when you re-sell it, or if you don't the buyer will eventually figure it out with a pre-buy. While that may not matter for SOME people, you
will chase off potential buyers with the "logs incomplete" or not available before "X" date. Doesn't matter if it's a year or 10 years.
To overcome that you have to be willing to offer a discount to offset the inconvenience. Or, just sit around and wait for someone to roll the dice on that missing time period. Like I said, a LOT can happen in a year. Being old is not an excuse. I owned a 1965 Cherokee with complete logs all the way back to 1965 and guess what? First year it rolled out it had a skin repair on one of the wings. That was a minor thing, but imagine an engine tear down because some buyer pranged it right out of the factory.
@Brad Z logs are an integral part of the aircraft, as much as the prop or engine. You are selling something incomplete when you don't have the proper documentation. It's not a small part either. Similar situation, think about a car with an accident history, however minute. I had a hit and run on my leased vehicle, it was completely superficial, buffed out, no damage. But that accident is on that car's history forever now. ANY time I have to deal with selling it, or trading it in, etc, I have to deal with the inevitable headache of explaining the situation and then trying to combat the arguments that it isn't worth as much as a car with no accident history.
There are people who would be willing to overlook a year of missing history, but to make a broad sweeping statement that a year of history is no big deal, or won't affect value is just not realistic. Of course it will affect value, of course it will affect price and of course it will affect resale maybe not to you, but to some potential buyers..definitely.