OK here goes. John's (I'll use that as your name as I don't know what it is) question is innocent enough, and Patrick's response is fine.
Where the issue will arise is posts which question the reliability of a vendor invite the common internet anonymous response which is usually based on some form of personal experience, heresay or a combination of those.
That's not enough to form an informed opinion. The best way is to give it a try and manage the risk until you have a better sense of the service you get.
Two hypotheticals: Patrick says he's had good experience with Interplastichobbies.com. You send them a pre-order for $ 75 for a kit that never materialises and spend months getting your money back, or some other kit you didn't want. You might blame Patrick, but the risk was yours.
Bill says that Interplastichobbies.com suck becaiuse he sent them $ 75 for a kit that never materialized, but he neglected to add that he started complaining to them 48 hours after the order, after a week he threatened to sue, after two weeks he demanded his money back.
John decides not to buy from them, they lose the business.
Two weeks after that Bill gets his order, but of course never goes back online to say so.
I've seen this happen too often.
I take back my use of the word "ban" but would substitute "best avoided".
Any time I order from a new source I take steps to either accept a possible small loss or use Paypal initially so that I have a chance of recompensation.
That's all, no offense meant.
Bill