Under the title of each product, on it's product page, is shown one of three different indicators:
Stock Level: In Stock - The item is in stock.
Stock Level: Good Stock - The item is in stock either in good quantities OR we have some stock and can get more quickly.
Stock Level: Service - The item is provided as a service. These are products that are ordered in on demand, please allow around 7 days lead time.
Items marked Pre-Order: Items marked Pre-Order are not yet released, we are taking orders on these items for fulfilment when the maker releases stock to us. The makers give guide dates in their catalogues but in general these are not overly accurate. Although you can pay for express delivery on pre-orders, this will only improve the delivery speed when the item leaves our warehouse.
All other items: We carry a vast inventory of stock. Everything shown as available to order is either (1) In Stock or back in within 48hrs as it's a stock line that's booked in on a pending delivery or (2) an order-in line that our suppliers maintain good stock of - and that we can get usually in only a few days. Items that are order-in will show as stock level Service.
Do you need to ask if we have it: If you ask if we have an item in stock, you will get a reply that's only accurate to the moment when we reply. If you then order 3 days later (as many people strangely do) you run the risk of someone beating you to the item.
Amazon and eBay: As many of our customers initially come to us via one of our Amazon or eBay stores, we are often asked about stock on there. As a rule it's the same stock. We employ a sophisticated control system which should ensure that items that sell on one site are updated on the others. This is relatively reliable but not infallible though, and can take time to update.