Purchase advice C70

Dear community I would like to buy a new, used car. The C70 of the year of construction from 2006 fits into my budget and I really like it. My desired motorization is the T5 with 220 hp, maybe also the 2.4i. Please tell me: – Are there weak points/macks, which I have to pay attention to when buying? – The top mechanism seems a bit shaky to me, does it do what? – Which components could cause trouble from 100,000 km times (turbo, cover etc.)? – What do the usual inspections cost and how often do they have to be carried out? – How much is the actual consumption? – Is the gas conversion useful (reserverad tub)? I thank you already for your helpful answers.