The short version
- Typical range: £25 – £180
- Biggest single factor: condition — see the table below
- Category: Pet Supplies
- Cost to sell on WishThrift: nothing, at any price
What a used aquarium is worth by condition
Condition does more to the price than anything else. These figures are worked from the top of the range for aquariums, so treat them as a starting point and adjust for the specifics of yours.
| Condition | Typical price | What it means |
|---|---|---|
| New with Tags | £180 | Unused, tags or seals intact |
| Like New | £153 | Barely used, no visible wear |
| Good | £117 | Light signs of use, complete and working |
| Fair | £81 | Heavily used, or a described fault or missing part |
| For Parts | £45 | Not working or incomplete, sold as seen |
These are the five grades WishThrift listings use, and sellers set the grade themselves — see what each condition grade means. Figures are shown in pounds as a reference point. On WishThrift prices display in your own currency, and sellers set their own asking price.
What raises the value of a aquarium
- Complete setups with filter, heater, light and stand
- Tanks with no chips, cracks or failing seals
- Larger volumes, which are disproportionately expensive new
- Recognised brands with spares available
What lowers it
- Silicone seals that have lifted or perished
- Chips at the corners, which risk failure under pressure
- Missing lids and light units, often model-specific
- Scratched acrylic tanks
How to work out what yours is worth
- Fill it outdoors and leave it standing to check for leaks
- Run a fingernail along every seam for lifted silicone
- Confirm the filter, heater and light all work
Once you have those three answers you can place your own aquarium on the table above with reasonable confidence. If it sits between two rows, price it toward the lower one — items priced honestly sell faster than items priced hopefully.
Ready to sell it? Listing on WishThrift is free, there is no commission, and you keep the full amount you agree with the buyer — see how selling works or create a free account.
Frequently asked questions
Should I test a used aquarium before selling?
Yes. Fill it outdoors and leave it standing for a few hours. A leak test is the single most reassuring thing you can tell a buyer.
What is the most common aquarium fault?
Perished or lifted silicone seals. Run a fingernail along the seams — any lifting means it needs resealing before use.
Do complete setups sell better?
Much better. Beginners need filter, heater, light and stand all at once, and a complete tank saves them sourcing each part.
More value guides: pet supplies guides · all value guides · browse live pet supplies listings.