SpaceSputnik makes a very good point in relation to being hard on boats. Light boats are very easy to load, unload and launch without being rough on them. That's not to say you should buy the very lightest layup because they tend to be very rigid which is great for performance but not so much for durability.
Stellar skis do tend to have fairly wide buckets. An excel layup of the Stellar model that best suits you would be an excellent choice. The excel layup is light and durable.
It sounds like you take your paddling reasonably seriously so it doesn't make sense to me to compromise on your enjoyment by limiting yourself to secondhand skis that may or may not be the right design.
A trip to your closest Stellar dealer would be an excellent investment in your paddling development. If you make a weekend of it; you can spend enough time testing the skis you are considering. Make sure to spend the same or similar time in each boat as you would do in normal use. There are comfort and stability issues that sometimes don't become apparent immediately. The dealer might have some well priced demo skis for sale.
Current boats
Epic V10L Ultra, Epic V9 Ultra, Carbonology Sport Boost X LV, Fenn Bluefin, Nelo 510, Fenn XT double, Nelo 600, Expedition Kayaks Azure, Mirage 732.
Previous boats
Spirit PRS, Fenn Swordfish, Fenn XT, Fenn Swordfish S, Think Zen, Epic V10L Club, Carbonology Sport Boost LV