⭐ Merited by nutildah (1)
over the course of 3 years
PrimeNumber7 registered in March 2019.
to answer your question, "somewhat likely".
How likely is "somewhat likely"? 1 in a million? 1 in a thousand? Bonus points if you can find another user who matches all findings in the OP and is not Quicksy's alt.
If anyone can do that I'll replace my neutral on PN7's account with a positive rating containing an apology. Posts created or edited after January 1 2020 don't count for obvious reasons.
I have no problem with you accusing PrimeNumber7 for being Quickseller, the problem is taking the information in the OP to "merely confirm" your opinion, because these information are really meaningless at their best, I don't know how can you give them any value, maybe because of the low sodium ? get some salt 
I'm not red-trusting or flagging the account. I do believe my neutral is fully justified though and I disagree that the OP info is meaningless.
On the other hand, if I'm so dumb that I could be so gravely mistaken then I don't deserve to be in DT anyway so if anyone thinks so feel free to exclude me. (this was edited down from a larger paragraph so it sounds a bit abrupt but that's pretty much the essence of my position on the matter so no need for too many words).
Nice try getting me killed with salt overdose
