Many praise the merits of Trans-X to get a little more life out of your clutches and seals. Yours may be a little too far gone but it's worth a try before pulling and rebuilding (a veritable PITA). On the other hand, no fluid change over the course of what should have been 3 changes, may be the only thing still holding the clutch packs and seals together.

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1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)