Maggie, I have/had several pairs of "Personality" shoes, NOS recently. One pair I've kept for my own wear and I sold two others. I think I have one or two pairs left. I had "issues" dating them and finally settled on early to mid 70s for all of mine. One pair I think may have been late 60s, but I am certain on 70s for the others. I agree with Jonathan that the lower-priced shoe lines in the U.S., of which Personality was one, didn't exactly set the world on fire with their "fashion-forward" look!
If it's any help, the pair I sold on eBay went dirt cheap, considering they were a size 10, but the buyer loved them! I think they sold for $14.99. I put the other pair on Ruby Lane, and got $24 for them--which I think was a very nice price for manmade inexpensive-when-new shoes!
Yours are very cute, and I think if you use "mod" as a KW and date them as 60s/70s, then clarify in your description (a late 60's look manufactured in the 70s....), you may do just fine with them! The ones I have were from a shoe store locally that went out of business, so it's entirely possible your shoes were made in the earlier 70s and were sold several years later.