Your asking their "opinion" their giving it. Many people feel just the opposite of that imagine you email me and tell me you have 500.00 to spend and want to get the most bang for your buck.. I tell you that it's to buy a female lesser platty, you bite and out goes the lesser. Now three months later you find out that you could have gotten 1.1 Pastels and 0.1 Spiders for the same price.
Which is better for your collection? Only you can decide that.
P.S. Tactful up-selling is an art that car dealer's, plastic surgeons, Cell phone and computer company's have perfected. Many people lack the ability to honestly "up-sell" a customer. If someone tells you that a female Lesser is your best bet ask them "WHY?". If it feels like they are feeding you a line then go a different direction. After all your not being forced to buy, you're simply asking their opinion.