View the car for what it actually is rather than what it tries to emulate. It sounds, from the blurb, like it's a halfway decent example so go to view it accompanied by someone experienced in sniffing out bullsh*t and bodge then, if it really is that good, chances are the price is reasonable.
There's loads of good advice right here on the forum (welcome, by the way) about what to look for when buying but assuming insurance can be had for sensible money, it would be a great choice for a first car since 1850s are much less thirsty than most people expect them to be, can be very reliable in long-term, regular use
(mine continues to work properly after 34,000 miles in 2 years and driving that car makes me smile just as much now as I used to do when I drove my first one, some 20-odd years ago), and have plenty of performance to be fun to drive, but not enough to cause shock and distress among insurers.
Check it over thoroughly, listen to your, or a more experienced companion's instinct when talking to the seller and if it doesn't "feel" right in some way, then walk away, there'll always be another for sale soon either here on the forum, on eBay or in classified listing publications such as Loot and the Yellow paper.