If you're serious..........all of the above. Whether people like to admit it or not, the audience for our kind of hobby cars is shrinking. Yes, it's shrinking slowly, not falling off a cliff, and there are some replacement hobbyists, but not one to one for the number departing. You don't know where or when your buyer is looking, so multiple offerings increases your odds. A buyer has far more to select from, and less competition for buying, today than say 20 years ago (those that doubt should count the number of 32 5 window coupes available on any given day today, as an example). A few cars still demand a premium, and enjoy continued value growth, but many don't (again, doubters can compare woodie prices today vs. 10-12 years ago, as another example). So, fewer buyers, more choices for the remaining ones, softening prices in many cases, all means you need to work a bit harder to make your sale............and don't expect a silver bullet solution.