I'm not selling ANY of my ProVaris...they've each become "friends" to me...and have seen me thru some horrible "nic-fits"...
Way back, three years ago...I was spending approx $25 every 2.5-3 days for my stinkies...So, quick math: $100 per week/$5200 a year +/- NOW that I'm vaping: 100 ml juice plus coils for my tanks=+/- $1200 a year = $4,000 NET SAVINGS!!!
My DH and I exist (almost) on our social security, which is paid once per month, so it is easy to control spending...I buy my juice and coils and any replacement gear on payday. I "allow" myself to spend a set amount every year near my "Vaperversary"...I'm on my THIRD now, so my choice was the Ti.
I understand broke...I'm over 60 and my DH is over 70, and we've seen tough times...(when I was 20, cigarettes were 28 CENTS and my wedding ring was in the pawn shop more than it was on my finger!)..but, you know, before I quit smoking...no matter HOW broke I was, I always had cigarettes! Now that I save so much more by vaping, rather than smoking, I use the "extra" cash for less important things...like food...doctor bills and prescriptions to ease the effects of COPD!
I've discovered that if you TRULY want something, you will find a way to get it....maybe not immediately...(I FINALLY earned my college degree before I turned 49...).. Who really wants " instant gratification" anyway?

I think I'm prouder of paying every dime of tuition and books by myself over 20 years than I would have been if parents had paid my way over 4 years...(IF I had parents, which I didn't!....although I don't know that I would have been deans' list, or had a 4.0 average...I might have been "normal" and been out drinking, and going to football games...and had parents yelling that I "wasn't taking school seriously"!)
But, I've gotten off topic, again...derned ADD!!!
I called provape and explained that my son let a battery leak in my V2...that is the "old design". For $70, they will upgrade the "brains" to V2.5, any color LED....and I'm going to do that, because I like the design of the case so much. I also have the Limited Edition Cherry Red and the Dragon. I plan on keeping all of them. I've got a spare "just in case"...and when my son's favorite "Mech of the day" quits, or shorts out, or gets lots, I have one to LOAN him...so he doesn't go back to stinkies...
So, my thought on you selling YOURS...would be this: I actually WOULD like to buy a used ProVari...I want to KEEP all of MINE..and I'd like to give one to my "little sister"...I think you said yours was "black" which is good....IMHO, some of those strange paint jobs would lower the price...otherwise, I'm with ENAUD...$100-130...depending on what is included...for ME...I only need an end cap with a mini...and whether it comes with batteries or not, I'd buy my sister NEW batteries anyway...so, that isn't important to me, either. As I've discovered, a new V2.5 (ANY COLOR) is $70...so, it's going to be tough selling anything except a "Limited Edition" and not "take a huge loss"...
But, take this into consideration, too...you really aren't "losing" anything...you've extended your life, improved your (future) quality of life, and you've saved a ton of (future) money on doctors and prescriptions by vaping and not smoking. (plus the money you save daily by NOT buying cigarettes!) I see the pulmonary doc once a month ($50) and there is just ONE RX that costs me close to $200 a month...(one of EIGHT prescriptions!!)
I understand wanting a "polished stainless steel"...they are pretty...but, for the most part, ProVaris are not "limited edition" "one of a kind". If I am searching ONLY for a black mini with endcap, and I can't buy yours for what I want to pay, someone else will have another black mini available soon....
So, if having $100 is going to make your life better, sell it...if you are going to feel like you are "taking a huge loss"...keep it...OR...better yet...since it is "pristine" put it in a box with new batteries, a charger and some sample juices and give it to Mom, Gramma, Dad, Brother...etc...and be a HERO...