i recently paid:
Gt3582R with v band housing from sonic performance for $1350
Precision 48mm waste gate from the realstreetperformance in the USA for $350
Kinugawa braided lines from ebay, good quality (had them pressure tested to 300psi and no leaks) $70
gaskets were only $50 in total for manifold gaskets and oil drain gasket & t3 turbo gasket,
$1100 for custom turbo manifold made from 3mm stainless steam pipe,
$400 for dump and wastegate pipe to cat
$100 for intake and hot side cooler pipe.