At the moment, as there's been a reshuffle in East Block:
Inside East Block as a guesstimate:
WW76, SJ281-SJ284 sans bogies? SZ287? 671M and 672M, K183, Taits 471M and 427M, the remains of the American car Victoria
, several buses including a 1965 ex-VR Comair (soon to be joined by another one hopefully), Pioneer and Enterprise, 32 and 40ABU, the heritage V cars, a bunch of trams...
Outside East Block:
ACZ260, MTH101-104, BIH181, BIH187, the club car Victoria (is it stored there? Been in there for ~2 months), 4-wheeled cement pot J16, a KMQ used for shunting, tram Z1 43, Hitachis 221M, 1947T, another Hitachi T, 155M, 195M on ground, DRC41, DRC42, a BN or BRN ex Kerang and two buses.
Outside East Block and allocated to pres groups: L1162, L1169, E1108 or E1106, three V cars (can't recall numbers), and a VLBF allocated to Steamrail. I might be missing some Steamrail stuff. Is the tuscan PHS Steamrails?
ARHS: oil tank 8, oil tank 52, oil tank 53, oil tank 111, horse box 7FF, guards vans 31CP, 174Z, QB7 with a C class boiler, VFGA3 or 4 (ex S class tender frame), VLAA(UB)52?, HH5, QR1, a pair of VLBF's, a particle board wagon, a cement pot and a KMQ.
More if I think of it.