Ideal for a replacement. This instructon book still appears to be in acceptable condition, in my opinion. However, it is pre-owned and may show some normal signs of minor wear due to use over the years. Before you buy, you should know this sale is for the instruction book only, and it doesn't include anything else from the set. I would be happy to provide any additional details you may need upon request. Please look over the photos carefully before you buy this, as I unfortunately can not accept any returns at my current address. You can also find more similar items in my eBay store category: Various Toys > LEGO Items