Welcome Vosadrian!
I'm DocS from the Bentrider forum.
I'm not using my Vendetta for commuting, but have a bag that should be able to carry a laptop mounted to my Thor seat.
I recently acquired a Moose bag (for keys, wallet, etc). Other than that I've removed the other bags in the picture...
I'm not a racer, but can manage a pretty decent average speed for an old fat man in hilly terrain (22 mph (35.4 kph) over about 75 miles (121 KM)).
I typically ride with Diamond Frame riders, but I tend to ride outside the group. Although I can draft off them if I chose, I can't provide much help to them, so stay to the side. There are a few very small riders who have been able to draft off me, so when they ride, I pull them. I never swap out, because I'm a stronger rider than they are...
I'm not sure if I mentioned it in the Bentrider forum, but I ride recumbent bikes/trikes exclusively because of lumbar back problems.
If I ride a standard bike for about 5 minutes, I loose feeling in my legs because of the compression.
The Standard Cruzbike seat was ok and I ended up doing surgery on my Ventist Pad to insert memory foam in the lumbar area (for support). Eventually, I just bought a Carbon Fiber seat and Ventist Pad from Greggor at Thor. For me, it made a big difference and I really like it. Many here have changed their seats out as well.
My frameset was an older Vendetta model that someone bought and never built. I got it for a great deal (and don't think I'll ever part with it).
It sounds like you've already made the decision and now, just have to pull the trigger...
One option that you might explore (before committing to the sale). Ask the seller if you can "lease" the Vendetta for a couple weeks. Stipulate that if you purchase it, they "Leased money" will go toward the purchase price. If you cause any damage, you'll repair it or pay for the parts....
He may or may not go for that, but It's a less riskier way for you to try a Vendetta...
If that doesn't work, like Frito said, You're looking to buy it, so it's reasonable to assume, there will be a buyer for it if you decide you don't like it...
I took that same risk when I bought my first Cruzbike (a Silvio 2.0). At first, I thought I made a mistake! It seemed very foreign to me, then one day, it simply clicked! Check out this link
https://forum.cruzbike.com/threads/spring-time-learning-to-ride-time.10889/
When I started learning to ride it, I excluded all other bicycles/trikes and just focused on getting better at riding the Cruzbike.
Good luck and God Bless,
DocS (AKA Rudy)