Short answer: yes
Longer answer, you need to find d out exactly how many miles are on the motor since the turbo has been installed, who did the install/tune, how much power is was it tuned for. The turbocharger itself is a wearable component and if it's 40-60k on the turbo you can expect to be replacing major components in the near future.
The biggest concern for me is actually the price, what they're asking is almost what it costs to purchase the turbo kit... something seems sketchy, my guess is it has a rebuilt/salvage title in which case I wouldn't touch the thing.
If the title is good ask them for maintenance history and get as many details as possible, keep in mind that a forced induction motor has a significantly higher chance of going kaboom. A N/A motor will usually give you plenty of warning when a component starts to fail, a F/I motor often just kabooms and you're stuck replacing a long block.
If you're looking for a daily driver find something else, if this is just a fun project or toy car then get more answers.