Why Valuation Is Your Most Important Pre-Bid Step
Excitement is the enemy of smart bidding. It's easy to get caught up in an auction and push past what an item is actually worth — a phenomenon sometimes called the "winner's curse." Doing proper valuation research before the auction begins is the single most effective way to protect yourself and bid with confidence.
This guide walks you through a practical, step-by-step approach to researching and appraising antiques without needing to hire a professional every time.
Step 1: Identify the Item Precisely
Before you can research value, you need to know exactly what you're looking at. Key identification factors for antiques typically include:
- Maker's marks and signatures: Look for stamps, hallmarks, maker's names, or signatures on the base, back, or underside of the piece.
- Period and style: Learn to distinguish Victorian from Edwardian, Art Nouveau from Art Deco, Georgian from Regency.
- Material and construction: Hand-stitched versus machine-stitched, hand-blown versus mould-blown glass, solid wood versus veneer — these details affect value significantly.
- Provenance: Any documentation of the item's history (previous owners, exhibition history, original receipts) can substantially increase value.
Online resources like Kovels.com, the Carter's Price Guide, and specialist society databases are useful for identifying maker's marks and styles.
Step 2: Research Completed Sales (Not Just Active Listings)
This is the most important distinction in valuation research: what items sell for matters far more than what sellers are asking.
On eBay, filter your search results to "Sold Items" to see actual transaction prices. On Invaluable and LiveAuctioneers, you can search past auction results. Price databases like Worthpoint aggregate historical sales data across multiple platforms (subscription required, but often available via public library access).
When comparing sales, look for items that match yours closely in:
- Maker, model, and period
- Condition (mint, excellent, good, fair, poor)
- Completeness (original parts, original finish, original packaging)
- Provenance and documentation
Step 3: Understand Condition Grading
Condition has an outsized impact on antique values. A piece in mint original condition can be worth multiples of the same item in restored or damaged condition. Familiarise yourself with standard grading terminology used on the platform you're using, and apply it critically to what you see in the listing photos.
Don't hesitate to ask the seller for additional photos of specific areas before bidding on high-value items.
Step 4: Factor In Buyer's Premium and Shipping
The hammer price is rarely the total cost. Always calculate:
- Buyer's premium: Typically 15–25% added on top of the winning bid on formal auction platforms.
- Shipping and insurance: Fragile or large antiques can be expensive to ship safely. Get a shipping estimate before bidding.
- Import duties: If buying internationally, check whether duty applies in your country for the item category.
Your true maximum bid should be calculated backwards from the total you're willing to pay, accounting for all these additions.
Step 5: When to Get a Professional Appraisal
For items with a potential value above a few hundred pounds, a professional appraisal from a qualified expert is worth the cost. Professional bodies such as the Royal Institution of Chartered Surveyors (RICS) in the UK and the American Society of Appraisers (ASA) in the US maintain directories of accredited specialists.
Many auction houses also offer free pre-sale valuations — useful even if you're buying rather than selling, as it gives you an independent view of the market.
The Golden Rule
Set your maximum price before the auction starts, based on your research — and don't exceed it. The discipline to walk away is what separates consistent winners from those who regularly overpay.