I have 2 of those Vespas & I love them . . .
They are just for hobby & fun. - My daily ride is modern plastic scoot (Sym RV180), which is great, but don’t give the feeling what real 2-stroke geared Vespa can give. The plus side is also local active Vespa clubs aroud the island & gatherings, rallies & yearly Taiwan Vespa days. I got lots of new friends & nice hobby for myseld & my son. . .
This year event in Dou Lio collected 600 Vespas (incl. some Lambrettas, Heinkels, Rabbits etc) & hobbyist together. - Great gyus & will help you to sort the problems you will face 
In Taichung is also very active Vespa club but I don’t have their contacts here. VCOT (Vespa Club Of Taiwan) & Mr. Christopher Yang (nuart@ms7.hinet.net) will surely help you to find local contacts, work shops, & hobbyist if you are interested.
Web site: vespa.com.tw/open.html
It’s true that modern scoot is better for daily use, but Vespa PX is definitely maintainable & useable for daily rides as well. - It needs more babying & maintenance, but well restored one (incl. frame, brakes, suspension & engine) are reliable & smooth rides. What you can expect from ~ 30 years old scooter if it’s not completely built again? Well restored will cost easily more than 50K but you can find good project 15-20 K (PX-PE). If you can not do anything DIY, for example, painting the scooter will cost ~ 20K (including stripping scoot on pieces & assembly back) The engine repair without crank & cylinder set will be ~ 7000 & cylinder sets (local) will cost ~ 4000, Italian ones 10-15K, new crank will be ~ 3500. You may also include new electronic ignition, bigger bore cylinder, bigger carb (even reed), expansion pipe, tubeless rims , disc brakes etc . . .
Generally speaking more older Vespa one more expensive.
Forgot to mention that DIY maintenance is anyway easy if you have done anything mechanic works before & Haynes’ service & repair manual is available & really good to have on hands when you are doing something first time. scooterhelp.com/ is also great source for more info . . . There are several other sites as well.
Amazingly lot of parts can be still purchaced locally in Taiwan & are made here . . . In fact they export lots of Vespa parts to overseas as well. I have ordered also expensive Italian , German, British parts via ebay & several online stores but the basic parts are all available in Taiwan. The only problem is to found local mechanic workshop which is specialized for those old timers & know how to source all parts. They are not in every corner like “normal” scoot shops, but still available & mainly supported by Vespa enthusiasts. Newer generation mechanics don’t know much about Vespas & only thing you might get there is new plug or new tire. . . So, the real Vespa mechanic can make sure that you can get your Vespa properly maintained & trouble free . . . or at least almost trouble free 
I restored 2 PX-PE’s during few years & spent ~ 100K /each (incl. bike) :loco: but they are in show condition & practically like new.

My first project, 1984 model, on Vespa days 2009 in Taipei

My second project, 1981 model
I have several front- rear racks, seats, flyscreens, original British spot lights, crash bars so the actual outlook may wary time to time . . .
Wellcome to happy group of Classic Vespa riders . . . You’ll never get bored & quarantee that these beasts will make you find your inner mechanic as well :roflmao: . . . .
More pictures: dotphoto.com/go.asp?l=juhalee