The 30-year-old was left in stitches when on closer inspection she spotted that the item, which costs £19.99 new, had a sticker on it saying “used”.
The item, which is still listed on the Lovehoney site, boasts “three speeds and four patterns for exciting vibration variations” and has 4.5 stars out of 5.
Ellie, from London, shared a picture of her bizarre discovery on Facebook later on that day, writing: “The used ‘tickled’ me! Why?”
The post has now collected over 1,700 likes with more than 900 comments from users who were disgusted by the find.
One user said: “I’m amazed anyone would donate a used sex toy to charity and the charity shop actually trying to sell it.
“That’s beyond disgusting.”
Another said: “I’m sure it’ll be fine once you’ve sterilised it in boiling water, washed it with industrial strength bleach and wiped it down with antibacterial spray.”
One member commented: “I’m hoping that whoever put this out for sale on the shelf, mistook it for a regular massager, otherwise that’s absolutely rank.”
One surprised social media user added: “I’d love to know who and how it was determined as used.”
Speaking today, Ellie said: “We were heading into town to buy some last minute Christmas presents when the g-tickler caught my eye in the charity shop window bottom shelf next to a pair of sparkly shoes.
“I couldn’t believe this made it to the window and on closer inspection I see the used sticker and fell into a fit of giggles.
“It’s safe to say this wasn’t purchased for one of his last minute gifts
“I was shocked and had so many questions. Who in their right mind donates this? Who decided to sell it?
“Who decided it was window worthy? How did they know it was used? And who in their right mind would buy this?”
A spokeswoman for the charity shop today said: “This product was put in the window as a joke.
“Our manager removed it upon finding it, although I’m not sure who put it there in the first place.
“Our shop only labels products with printed prices, but this was a handwritten price label.
“It’s certainly not something that we’d sell.”