Hi bro
Peugeot France is very strict on warranty. To confirm warranty, email Clic Peugeot, the car reg number. They'll tell if warranty is void. They are also on Facebook. I suspect warranty may be void due to non compliance of service schedule. Used car dealers only want to make a quick buck, they are not interested in service schedules.

It does not mean this car is bad. I suggest you look whether the car is worth buying without warranty. IMO it is worth buying if the price is right. it's my 4th year of ownership. My reasons for saying it's worth it are as follows:
1.The engine & gearbox are reliable, I have had no problems up to now. No complaints from other owners too. Some complaints about sensors, which are not very expensive to replace.
2. Spare parts are reasonable, they are available at Peugeot spare part shop. I just bought rear brake pads for $160/-, ABS sensor for $190/-.
3. Now more Peugeot workshops are available, so maintenance and repairs are getting reasonable. No need to go to Service centers for cut throat price.
4. For the price, there is no other car to match performance. It is a very enjoyable car.

No need to worry bro. Many of us here at this forum are well versed with this car. Always willing to give you a helping hand. Go for it, you'll thoroughly enjoy this Lion!