Dear Venkakrishna
The answer to querry can be given as follows: -
(you may read yellow & red colour highlighted part only): -
1) Dealer has been defined under VAT as: -
'Dealer' means any person who carries on business in Delhi and includes-
1. any person who, for the purposes of or in connection with or incidental to or in the course of his business buys, sells, goods directly or otherwise, whether for cash or for deferred payment or for commission, remuneration or other valuable consideration;
2. any department of the Central Government or a State Government, a local authority, Panchayat, Municipality, Development Authority, Cantonment Board and each autonomous or statutory body or an industrial, commercial, banking, insurance or trading undertaking whether or not of the Central Government or any of the State Governments or of a local authority, if it buys, sells, supplies or distributes goods, in the course of specified activities which may be prescribed from time to time;
3. a factor, commission agent, broker, del credere agent, or any other mercantile agent by whatever name called, who carries on the business of buying, selling , supplying or distributing goods on behalf of any principal, whether disclosed or not;
4. an agent of a non-resident (where such non-resident is a dealer under any other sub-clause of this definition);
5. a local branch of a firm or company or association of persons, outside Delhi where such firm, company, association of persons is a dealer under any other sub-clause of this definition;
6. a club, association, society, trust, or cooperative society, whether incorporated or unincorporated, which buys goods from or sells goods to its members for price, fee or subscripttion, whether or not in the course of business;
7. an auctioneer, who sells or auctions goods belonging to any principal, whether disclosed or not and whether the offer of the intending purchaser is accepted by him or by the principal or a nominee of the principal;
8. a casual trader; or
9. any person who, for the purposes of or in connection with or incidental to or in the course of his business disposes of any goods as unclaimed or confiscated, or unserviceable or scrap, surplus, old, obsolete or as discarded material or waste products by way of sale;
2) Sales has been defined under VAT as: -
Sale includes:-
1. The conventional sale i.e. Transfer of property in goods;
2. Supply of goods by a society, club, firm, and company to its members;
3. Transfer of property in goods involved in execution of works contract;
4. Delivery of any goods on hire purchase or any other system of payment by instalments;
5. Transfer of right to use any goods, whether or not for a specified period; and
6. Supply of good or other articles by the restaurants, hotels etc., by way of or as a part of service.
Further, Value addition doesn't mean any value added either in quality or quantity or any content of the goods rather value addition means any increase in the rate of the goods sold & hence, liability to pay VAT arises.