Hi there!
Over the past couple of years, I've been slowly selling off my collection from when I was a kid back in the 1970s. All of the complete sets (4th-16th) I had were sold individually by series. I am now selling the balance of the cards I have left from the 4th series through the 12th series. Although none of the series are complete, some of them are pretty darn close. There are 239 up for sale. 274 is the total needed to have all of these series complete. Below is a link to eBay where they are currently listed. Please take a look and if you have any questions, please feel free to contact me.
Thanks!
Tom
https://www.ebay.com/itm/WACKY-PACKAGES-4th-12th-Series-Lot-of-239-out-of-274-Complete-1974-75-tan-Topps/264544247221?