Second-handed race bike (OLMO sportsman)

This is a secondhand race bike from OLMO sportsman. I purchased it in 2021 from a secondhand shop and I colored in black by bike sprays by myself you can see the original color of the OLMO frame From the photo above.
Everything is in good condition except gears. For the gears, it has 6 levels on its gear change but sometimes it is stuck when I change the gear to another level. However, there is no issues with riding it and also this should be the one which can be fixed easily at a bike shop.
I also sell a lock and drink holder as you can see in the photo altogether with this bike for the price below.

You can also try riding it before you purchase it. My address is on Beethovenstraat, 1077HM Amsterdam. (I’ll let you know the full address, when you decide to come by to check it or purchase it.)
I would like to sell it as soon as possible, and please understand this will be sold on a first come first serve basis. I’ll sell it to the person who can purchase it for EUR 300, or the highest bid by 16th Jan 2025.

Details of the original frame
Seat tube: 56.0 cm (center-top)
Seat tube 54.5 cm (center-center)
Top tube: 55.0 cm (center-center)
Head tube: 13.2 cm
Fork shaft: 18.1 cm
Front spacing: 100 mm
Rear spacing: 130 mm
Seat post: 27.0 mm
Bottom bracket: ITA (70mm)
Tube set: frame: Dedacciai CrMo, fork: Dedacciai CrMo
Dropouts: frame: Dedacciai CrMo fork: -
Weight: frame 2.34 kg / fork 0.70 kg