ok,
Well the only difference between your car and a berlina is a different interior,rear reading lights, consol, electric aerial, exterior badging & striping. This would be lucky to add the 47kg tot he car probably 20kg tops.
Just for an idea I bought a VK carbie berlina for $300, Excellent interior,the body is a little rugged, no rust just dents, engine needed a bit of work along with the suspension & brakes. I spent $1700 on parts, rego & insurance. It ended up with a rebuilt 202 (I already had most of the parts) rebuilt gearbox, a few suspension bushes, springs & rear shocks, new windscreen, bit of an external tidy up and a new CD player (pioneer) and speakers.
It could do with around $2000 spending on it to bring it up really nice but its not happening. Its just a Daily hack.
HM Gem is a bulk engine reco place there are others around personally I would stay away from them.
Basically what they do is they mass produce engine recos and the quality isnt really there as they are built to a price.
If you get an engine rebuilt do it yourself or at least organise it yourself, get the block machined by a good machine shop, buy a new cam suited to how you want the engine to perform, get the head rebuilt to suit the application and the cam you choose.
Either you or have someone reassembled it with good bearings, rings & gaskets, have the bottom end balenced use pistons like ACL duralite III or if you want a quicky a set of ACL race series pistons (lighter) use a good water pump like a GMB, JP oil pump.
The engine will cost a bit more but should last longer and be overall a better engine.
Personally I just do an inspection myself or take it to a mechanic so it can be put up on a hoist.
General First inspection
First I find out the service history and how its been looked after.
I have a look at the engine inside the rocker cover for gunk build up,
Check coolant, oil, brake fluid, auto fluid for signs of lack of maintainance or car abuse
Check out how the the car drives, brakes, rattles & clunks etc
Have a look at the tyres to see how the car has been driven buy its owner, front - if the outer edge is feathered its been consistantly cornered hard, rear - in a single spinnger see if one is worn more than the other may be as a result of burnouts etc, if an LSD both balding.
Body wise look for rust around the screens, bottoms of the guards & doors, Check for rust around the plennum (the space where the windscreen wiper motor is)
check for wet carpet could suggest windscreens are leaking.
Check for water tracks in dust in the boot, wet or damp carpet, water in the drivers side wheelwell, check the spare wheel space for evidence of dents or scrapes from under neith.
REVS check before next step
If all the first check is good depending on the price of the car I will do the following
Compression test
Under car inspection on a hoist, inspecting general under side of the car condition, suspension rubbers, brakes, ball joints, tailshaft, engine for oil leakes, gearbox for leaks.
If all checks out or i identify a few problems I make an offer or pay the money.
cheers
Scott
cheers
Scott