All items purchased from us can be returned only if we had described not correctly the item, within 10 days of receipt, in exactly the same condition, insured. Prior notification is required.Payments must always be made in advance. North American institutions can be billed. We accept Discover, VISA, Master Card and American Express for orders under $1000. We accept also Bank wires, Bank cashier's checks and Postal Money orders as payment. In the cases of Bank checks, USPS Money orders and/or Bank wires being utilised in making payment, please understand the the item(s) will ship only after payment is verifiably cleared as "Funds collected" by our Bank (7-10 business days). Prices are subject to change without notice and arenet to all, including dealers.We do not offer discounts, and we do not negotiate our prices, regardless of number of books ordered.Shipping cost will be charged at cost and the buyer will be notified of the exact amount. Items are usually shipped with UPS Ground insured the next business day after receipt of payment. We can send the items the same day by UPS or FedEx delivery overnight or 2nd day. Non-US orders are usually by US Mail, airmail or express. We could also ship with FedEx. All orders should be insured, as we will not be financially responsible for loss. Virginia State residents must pay a sales tax of 5.00%. Virginia Dealers must submit a copy of the Certificate of Registration with a valid resale number.Title to any goods does not transfer from the seller until payment has been received in full. Any contract arising from this website is made under U.S. law. The invoices that are not paid within seven (7) days will be void. Finance charges for delayed payments: Daily periodic rate 0.0637% (Nominal annual percentage rate= 23.24%)