Not an easy selection to find but here are some bottles that have been auctioned latly and all are around 400 euros or cheaper. I would recommend the 8 year old aberlour it is amazing, the family casks by Glenfarclas are good as well and should be available..
Aberlour Original Bottling 18.January 1965 3 30 years old 43% vol, 70 cl

Aberlour Original Bottling 1965 over 8 years old An Unblended All Malt Scotch Whisky Gradi 50, 75 cl

Auchentoshan Original Bottling 4.10.1965 b.1997 31 years old Cask no.2144 45.6%vol, 70cl

Bruichladdie Original Bottling ' 1965 ' b.2003 37 years old Legacy Series 2 41.8%vol, 70cl

Bruichladdie Original Bottling 1965 22 years old Riserva Veronelli 48,8% vol, 75 cl

Bunnahabhain Original Bottling 1.11.1965 b.4.4.2001 35 years old Cask no.7159 one of 594 Bottles 53.9%Vol, 70cl

Glen Garioch Original Bottling 1965 21 years old 50%vol., 75 cl

Glenfarclas Original Bottling 1965 b.27.2.2007 Cask no.3861 one of 417 Bottles The Family Casks 60.0% VOL, 700ML

Isle of Jura Original Bottling 1965 26 years old The Stillman`s Dram 45% vol, 70cl

Knockando Original Bottling 1965 b.1989 Extra Old Reserve 43% vol, 75 cl

Macallan Original Bottling 1965 b.1983 17 years old Special Selection 43% vol, 75 cl

Macallan Original Bottling 1965 b.1990 25 years old The Anniversary Malt 43% Vol, 75cl
Tullibardine Original Bottling 1965 b.February 2008 Cask no.939 48.3% vol, 70cl 700ml

Tullibardine Original Bottling 1965 b.May 2005 2 Cask no.949 2

Len