Hi ! The average price on the market now is from $60 / 1000 and up. The most important thing is not to send 1000 messages, but to keep these messages alive as long as possible and visible to those to whom you sent. Even if the account will be deleted because of complaints it is important that the message remains visible to the recipient because everyone has different time zones and the longer the message lives the better you get conversion. And yes yourself to use any software will not work because you will again need good trusted accounts for mailing, which are now difficult to find. If the accounts will be bad, your messages will live a few minutes and no one will see them. And you need to know the current algorithms and all sorts of restrictions for mailing in general it is better to look for someone who does and who has a reputation and not where very cheap