不知道是不是我英语不好，我怎么就不懂这位老外说什么

我从询盘上得到了一个客人，是这样的，他对袋感兴趣 hello iris i apologize for.the delay in my response...i am very interested in item no.8 or item no 9..i will take a??sample of either one . >if.it works out good i would like to buy a large amount..how many come in a case . >and what would be the price per case and how many items total...i would most likely get 3 cases to start... >heres the address to send the sample 我不太明白他说的case是什么概念 thank you so much for your kind mail! >no .8??and??no .9 the inventory only??one black. >of course , this color you want , we can make new one for you . >but ,no matter what, we need charge sample fee of usd20 and freight collect. >company account and paypal, which is more convenient for you? >to confirm the address again : 我附上一张照片是黑色系，只剩一个了，接着他回， ok the black is good that the one i was looking at..so if i get it there will be 2 items in,my order correct 这是什么意思呢，说他之前已经有一个了吗。怎么会是两个呢？ 他有想订单的意思吗，