1978 Mattel Donny and Marie Osmond Catalog
After a successful 1977, Mattel expanded their offerings of the squeaky clean duo and even made it a trio by adding freckly brother Jimmy to the mix. The steam ran out however, their show ended by 1979 and the Donny and Marie line didn't return to Mattel.
If I recall from my toy dealer days, Jimmy was kind of tought to find at one point but recent ebay research shows a boxed ended at $23.
The Hollywood Home Playset may have never seen release, at least I could find no evidence of it.
From what I can tell Donny and Marie stuff is very affordable to collect these days. I can remember finding bagged Donny and Marie dolls in close out stores in the late 1980s.
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